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  • 300 Norma Mag


    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    300 Norma Mag Load Data
    10/14/2014
    (1 vote)


    Wanted to get this back up on the new site:

    There is lots of scattered handloading info for the 300NM but I haven't found a dedicated thread so I started one. Loads are organized by bullet weight. Anyone have a different load they really like? Here's what I've found so far:

    Trim to: 2.4902" min 2.502" max

    208 AMAX
    87gr H1000
    28” 1-9 Pac-Nor
    3140fps

    210gr Berger
    89.5gr Ramshot magnum
    27” 1-10 Rock Creek

    210gr Berger
    89 g. Retumbo
    27" barrel
    3130 fps

    215gr Berger
    92grs RL33
    30” barrel
    COAL 3.600”
    3157 fps (90% case fill)

    215gr Berger
    89gr Retumbo
    26” barrel
    COAL 3.600”
    3130fps

    220gr SMK
    92gr H-1000
    26” Broughton 1-9
    Fed 215GM
    COAL 3.463
    3003fps

    220gr SMK
    91gr N-570
    30" Bartlein 1-10
    Fed 215GM
    3200fps

    Berger 230gr
    H1000 85.5 gr
    27” 1-10 Krieger 5R
    Velocity ???

    Berger 230gr
    Retumbo 87gr
    27” 1-10 Krieger 5R
    Velocity ???

    Berger 230gr
    H1000 80.7gr
    30" 1-10" Lilja
    Fed 215M
    COAL 3.526"
    Velocity ???

    230gr Berger
    89grs RL33
    30” barrel
    COAL 3.600”
    3050 fps (90% case fill)

    230gr Berger
    86gr Retumbo
    26” barrel
    COAL 3.600”
    3020fps

    230gr Berger
    88gr RL33
    Barrel ???
    COL 3.510
    2907fps ES: 3.5

    230gr Berger
    86gr H50BMG
    25.5” barrel
    FED 215M
    COAL 3.530”
    2800fps ES: 3.6

    230gr Berger
    86gr N570
    1-10 barrel
    Fed 215M
    3001fps

    230 Berger
    85.3gr Retumbo
    26" barrel 1:9.5
    WLRM primers
    2940fps

    240gr SMK
    81.7gr H-1000
    26” Broughton 1-9
    Fed 215GM
    COAL 3.436
    2875fps

    240gr SMK
    H1000 81.7gr
    Fed 215M
    COAL 3.436”
    Velocity ???

    Rate now:
    mkollman74XFirst Sergeant
    Rating: 3.8/5 this site
    1518 posts this site
    Re: 300 Norma Mag Load Data
    10/14/2014

    I am not in a position to contribute at this time, but I am a consumer of the info contained. With any luck I'll get my 300 Norma built, and be able to contribute in the coming months. The info RE: barrel length and twist is especially helpful. Bring on the additional data. Anyone running a relatively short barrel?
    Rate now:
    260shooterXSergeant
    Rating: 0.0/5 this site
    192 posts this site
    Re: 300 Norma Mag Load Data
    11/28/2014

    I believe my 208 A-MAX load was the first one posted. But is a little off.
    208 A-MAX
    88.8 H-1000
    Fed 215 Primer
    OAL 3.490
    3100 fps
    ES 8
    28" 1X9 Pac-Nor
    Rate now:
    RedRangerRickXGunny Sergeant
    Rating: 3.1/5 this site
    739 posts this site
    Re: 300 Norma Mag Load Data
    01/11/2015


    Well I've scoured the section for 300RUM loads with 208s and had no luck. I wonder how close the NM loads would work?

    Rate now:
    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    Re: 300 Norma Mag Load Data
    01/18/2015 Last edited 07/30/2015 by jonthomps


    230gr Berger

    H1000 82gr (*max load in my rifle*)

    28" 1-10 barrel

    Fed 215M

    COAL 3.500"

    3012fps

    Rate now:
    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    Re: 300 Norma Mag Load Data
    01/26/2015


    Reached out to Corey @ Berger Bullets. Here is the data he gave me for their 215gr pill:
    215 Grain, PN: 30423 Bullet, CIP 3.680" COAL, 26" Barrel. 11/5/2014 RB
    Bullet Powder Start Load In Grains Approx. Start Velocity Max. Load In Grains Approx. Max. Velocity Fill Ratio
    215 Grain Accurate Magpro 81.5 2795 86.0 2945 90%
    215 Grain Alliant RE-33 92.5 2838 97.3 3007 98%
    215 Grain Hodgdon H1000 83.5 2793 87.7 2932 98%
    215 Grain Norma 217 87.0 2823 91.6 2971 103%
    215 Grain Hodgdon Retumbo 87.0 2828 91.7 2974 101%
    215 Grain Viht. N570 88.0 2847 92.8 3018 98%
    Rate now:
    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    Re: 300 Norma Mag Load Data
    01/27/2015


    Here is Berger's data for either of their 230gr pills:



    .300 Norma Magnum
    230 Grain, PN: 30428 Bullet, CIP 3.680" COAL, 26" Barrel. 1/6/2015 RB
    Bullet Powder Start Load In Grains Approx. Start Velocity Max. Load In Grains Approx. Max. Velocity Fill Ratio
    230 Grain Alliant RE 25 78.0 2695 82.3 2821 93%
    230 Grain Hodgdon Retumbo 84.5 2735 89.1 2874 100%
    230 Grain Hodgdon US 869 94.0 2669 99.2 2844 105%
    230 Grain Hodgdon H50BMG 90.0 2682 94.7 2848 105%
    230 Grain Alliant RE 50 93.5 2736 98.6 2913 103%
    .300 Norma Magnum
    230 Grain, PN: 30110 Bullet, 3.680" COAL, 26" Barrel. 4/7/2014 RB
    Bullet Powder Start Load In Grains Approx. Start Velocity Max. Load In Grains Approx. Max. Velocity Fill Ratio
    230 Grain Ramshot Magnum 80.5 2626 84.5 2749 87%
    230 Grain H-1000 80.0 2654 84.1 2786 95%
    230 Grain VIHT N570 79.0 2533 88.1 2850 94%
    230 Grain RE-33 88.5 2704 93.2 2865 96%
    Rate now:
    lapua50XPrivate
    Rating: 0.0/5 this site
    11 posts this site
    Re: 300 Norma Mag Load Data
    02/24/2015


    Hi there guys



    i loaded up 230 berg in my 300 NM with H1000 84.1 got av 2900 fps very tight group at 100m



    though using NORMA brass using 215 Feds I noticed after 1 and 2 firings 2 of the relaoded brass the 215 where loose .



    set my die FL sizing die to match as close as possible the gun chamber is it the brass pressures are good fr this load any ideas anyone ?

    Rate now:
    MonstaPuggernautXPrivate
    Rating: 0.0/5 this site
    3 posts this site
    Re: 300 Norma Mag Load Data
    03/16/2015


    Yahtzee. I'm glad I found this thread.

    Rate now:
    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    Re: 300 Norma Mag Load Data
    03/21/2015


    Out shooting this AM. Great load that shot in the .3's, but it's pretty hot:

    Norma brass

    215gr Berger hybrid

    90gr N570

    FGMM 215 primer

    3185fps average over 5 shots w/ slight ejector marks from a 28" Bartlein med palma.



    Rate now:
    grunklXPrivate
    Rating: 3.0/5 this site
    5 posts this site
    Re: 300 Norma Mag Load Data
    04/05/2015


    I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.

    My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.

    Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?

    The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!

    Grunkl

    Rate now:
    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    Re: 300 Norma Mag Load Data
    04/07/2015

    grunkl wrote:
    I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.

    My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.

    Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?

    The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!

    Grunkl
    Without running the thread off topic too much, I'd say go with Defiance Deviant action. Word to the wise: Nosler is a little overly enthusiastic about the Accubond LR bullet BC's. Do a Google search regarding the accuracy of their advertised BC's. Litz published some info on it.

    Rate now:
    Idahohorseman

    XGunny Sergeant
    Rating: 3.4/5 this site
    627 posts this site
    Re: 300 Norma Mag Load Data
    04/08/2015

    jonthomps wrote:
    grunkl wrote:
    I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.

    My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.

    Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?

    The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!

    Grunkl
    Without running the thread off topic too much, I'd say go with Defiance Deviant action. Word to the wise: Nosler is a little overly enthusiastic about the Accubond LR bullet BC's. Do a Google search regarding the accuracy of their advertised BC's. Litz published some info on it.

    Yesterday, I finished up developing the lo0ad for my BAT Machine actioned long range hunter 300 NM. Wicked accurate and easy to find a load.... Berger 230, Retumbo 86 gr., FGM magnum, 2973 fps out of a 24" suppressed Broughton.... hole in hole accurate at 100M. tomorrow I will stretch it out to a thousand. I am confident it will do well.


    Rate now:
    nnnn16XCorporal
    Rating: 0.0/5 this site
    72 posts this site
    Re: 300 Norma Mag Load Data
    04/26/2015


    230 Berger OTM .719

    85.4 of H1000

    Norma Brass

    Fed nonmatch primers

    22" barrel

    last 100 yd string was 2867, 2867, 2867, 2853, 2862 and they were all in 1 hole

    This rifle has been amazing. Consistent 1000yd groups between 5 and 6 inches. I finally found a spot to shoot the mile (1762) and when we finally went the wind was wildly inconsistent but I had 1 of 13 on target. There was zero splash visible so I'm certain it'll be better next time. I'll take one at a mile considering this rifle represents my first try at long range, first try at reloading, first try at cutting a chamber and building a rifle, first try at a bolt gun actually.

    I have had a problem with the brass. About one of every 3 cases won't rechamber in the rifle. They will but I have to really fight to get the bolt closed. Any tips or logic that someone could provide would be extremely helpful.



    Rate now:
    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    Re: 300 Norma Mag Load Data
    04/27/2015


    It seems like brass life is a common complaint of the 300NM. Speed costs. I'm pushing mine pretty hard and it looks like 3 reloads is all she's gonna give me. If Lapua came with brass (or if someone else like RWS made some tough brass) we'd all be in heaven.

    Rate now:
    ugsly308XSergeant
    Rating: 3.1/5 this site
    245 posts this site
    Re: 300 Norma Mag Load Data
    06/19/2015

    nnnn16, have you tried bumping the shoulder back just a tad? I run mine thru a redding body die and havent had any problems with it. Dont force it, you'll end up galling your lugs. You want them to chamber like butter.

    Casey
    Rate now:
    rowen99XSergeant
    Rating: 3.1/5 this site
    170 posts this site
    Re: 300 Norma Mag Load Data
    07/10/2015


    83.0 grains of Retumbo
    Fed 215M
    230 Berger
    10Twist
    26"
    2897 FPS
    Verified at 1287 yards

    Rate now:
    jonthompsXFirst Sergeant
    Rating: 3.5/5 this site
    2098 posts this site
    Re: 300 Norma Mag Load Data
    07/23/2015


    88.0gr N570 & 215FGMM
    3.600" OAL
    215 Berger hybrid
    1-10" twist
    28" barrel
    3150fps avg

    What a hammer! No pressure signs and extremely accurate. Shot several sub 1" groups at 356y.

    photo 1719CB23-5A76-422E-AB69-8F9C9656D329_zpsjbe6onib.jpg

  • #51
    Originally posted by Peterson Cartridge
    Hello .300 Norma Mag Shooters,

    We are an American manufacturer of match-grade brass located in Pittsburgh, PA. We are working on our first run of .300 Norma brass and are looking for evaluation shooters to test it out. If you would be interested in receiving some samples and providing us with your feedback, please fill out the form at https://www.petersoncartridge.com/sh...n-registration

    Happy Shooting!
    Clint
    Signed up. Thanks for the opportunity to help out


    Sent from my iPhone using Tapatalk
    Savage 12 LRP 6.5 Creedmoor
    Savage 10 308 w/ Vortex Diamondback
    DPMS AR 15 w/ EOTech and 3x
    Marlin 45-70
    Rossi 45 LC
    Ruger 10/22
    Smith and Wesson E Class 1911
    Springfielf XDm 40
    Glock 19
    Ruger GP100 357
    Smith and Wesson Model 629 Classic 44 Mag
    Mossberg 500 12 Gauge

    Comment


    • #52
      I'm running a 26" carbon fiber Proof Research barrel. My initial load development looks like this.

      230gr Berger Hybrid
      1/9 twist
      CCI 250 primer
      92.6grs RE33
      2972 fps @ 6.1 SD

      There were great nodes at this velocity and at 2880 fps. This barrel still has less than 100 rounds through it, but I needed a load to take it elk hunting. So this is it. My Proof barrels in the past have usually picked up about 120fps by the time they hit 170 to 200 rounds. So I'll rework this load after I get it broke in. I'm sure I'll be able to drop that powder charge down and still stay on that node.

      Comment


      • #53
        Shot this group yesterday evening. 3 shots, 356 yards, 2/3". This is a hot load but the accuracy speaks for itself!
        215 Berger
        88gr N570
        2.815" BTO
        SD: 11.1
        3170fps
        Those who are merciful to the cruel, are cruel to the merciful. - Talmud

        Comment


        • #54
          Originally posted by jonthomps
          Shot this group yesterday evening. 3 shots, 356 yards, 2/3". This is a hot load but the accuracy speaks for itself!
          215 Berger
          88gr N570
          2.815" BTO
          SD: 11.1
          3170fps
          I am shooting the 215 Berger right now too. I am really impressed with them. I shot this group last weekend at 765 yards. Not to bad for a brand new rifle and this was my first shots fired out of it.



          Sent from my iPhone using Tapatalk
          Savage 12 LRP 6.5 Creedmoor
          Savage 10 308 w/ Vortex Diamondback
          DPMS AR 15 w/ EOTech and 3x
          Marlin 45-70
          Rossi 45 LC
          Ruger 10/22
          Smith and Wesson E Class 1911
          Springfielf XDm 40
          Glock 19
          Ruger GP100 357
          Smith and Wesson Model 629 Classic 44 Mag
          Mossberg 500 12 Gauge

          Comment


          • #55
            thank you Clint, I just signed up for brass and testing

            Comment


            • #56
              did anybody get their brass from Clint? I saw his post was from June? I just got a new stock on my 300NM and heading to the range tomorrow with 210 Berger and RL-33

              Comment


              • #57
                I dropped a nice little 5x6 bull elk with the 230gr Berger Hybrid this past Sunday. The rumors that the big Hybrid makes a pretty good hunting round are true. My bull made it 14 yards from where i hit him. Post mortem showed the bullet performed perfectly.




                Last edited by Birddog6424; 10-26-2017, 06:30 PM.

                Comment


                • #58
                  Originally posted by Guest View Post
                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  300 Norma Mag Load Data
                  10/14/2014
                  (1 vote)

                  Wanted to get this back up on the new site:

                  There is lots of scattered handloading info for the 300NM but I haven't found a dedicated thread so I started one. Loads are organized by bullet weight. Anyone have a different load they really like? Here's what I've found so far:

                  Trim to: 2.4902" min 2.502" max

                  208 AMAX
                  87gr H1000
                  28” 1-9 Pac-Nor
                  3140fps

                  210gr Berger
                  89.5gr Ramshot magnum
                  27” 1-10 Rock Creek

                  210gr Berger
                  89 g. Retumbo
                  27" barrel
                  3130 fps

                  215gr Berger
                  92grs RL33
                  30” barrel
                  COAL 3.600”
                  3157 fps (90% case fill)

                  215gr Berger
                  89gr Retumbo
                  26” barrel
                  COAL 3.600”
                  3130fps

                  220gr SMK
                  92gr H-1000
                  26” Broughton 1-9
                  Fed 215GM
                  COAL 3.463
                  3003fps

                  220gr SMK
                  91gr N-570
                  30" Bartlein 1-10
                  Fed 215GM
                  3200fps

                  Berger 230gr
                  H1000 85.5 gr
                  27” 1-10 Krieger 5R
                  Velocity ???

                  Berger 230gr
                  Retumbo 87gr
                  27” 1-10 Krieger 5R
                  Velocity ???

                  Berger 230gr
                  H1000 80.7gr
                  30" 1-10" Lilja
                  Fed 215M
                  COAL 3.526"
                  Velocity ???

                  230gr Berger
                  89grs RL33
                  30” barrel
                  COAL 3.600”
                  3050 fps (90% case fill)

                  230gr Berger
                  86gr Retumbo
                  26” barrel
                  COAL 3.600”
                  3020fps

                  230gr Berger
                  88gr RL33
                  Barrel ???
                  COL 3.510
                  2907fps ES: 3.5

                  230gr Berger
                  86gr H50BMG
                  25.5” barrel
                  FED 215M
                  COAL 3.530”
                  2800fps ES: 3.6

                  230gr Berger
                  86gr N570
                  1-10 barrel
                  Fed 215M
                  3001fps

                  230 Berger
                  85.3gr Retumbo
                  26" barrel 1:9.5
                  WLRM primers
                  2940fps

                  240gr SMK
                  81.7gr H-1000
                  26” Broughton 1-9
                  Fed 215GM
                  COAL 3.436
                  2875fps

                  240gr SMK
                  H1000 81.7gr
                  Fed 215M
                  COAL 3.436”
                  Velocity ???

                  Rate now:
                  mkollman74XFirst Sergeant
                  Rating: 3.8/5 this site
                  1518 posts this site
                  Re: 300 Norma Mag Load Data
                  10/14/2014
                  I am not in a position to contribute at this time, but I am a consumer of the info contained. With any luck I'll get my 300 Norma built, and be able to contribute in the coming months. The info RE: barrel length and twist is especially helpful. Bring on the additional data. Anyone running a relatively short barrel?
                  Rate now:
                  260shooterXSergeant
                  Rating: 0.0/5 this site
                  192 posts this site
                  Re: 300 Norma Mag Load Data
                  11/28/2014
                  I believe my 208 A-MAX load was the first one posted. But is a little off.
                  208 A-MAX
                  88.8 H-1000
                  Fed 215 Primer
                  OAL 3.490
                  3100 fps
                  ES 8
                  28" 1X9 Pac-Nor
                  Rate now:
                  RedRangerRickXGunny Sergeant
                  Rating: 3.1/5 this site
                  739 posts this site
                  Re: 300 Norma Mag Load Data
                  01/11/2015

                  Well I've scoured the section for 300RUM loads with 208s and had no luck. I wonder how close the NM loads would work?

                  Rate now:
                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  Re: 300 Norma Mag Load Data
                  01/18/2015 Last edited 07/30/2015 by jonthomps

                  230gr Berger

                  H1000 82gr (*max load in my rifle*)

                  28" 1-10 barrel

                  Fed 215M

                  COAL 3.500"

                  3012fps

                  Rate now:
                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  Re: 300 Norma Mag Load Data
                  01/26/2015

                  Reached out to Corey @ Berger Bullets. Here is the data he gave me for their 215gr pill:
                  215 Grain, PN: 30423 Bullet, CIP 3.680" COAL, 26" Barrel. 11/5/2014 RB
                  Bullet Powder Start Load In Grains Approx. Start Velocity Max. Load In Grains Approx. Max. Velocity Fill Ratio
                  215 Grain Accurate Magpro 81.5 2795 86.0 2945 90%
                  215 Grain Alliant RE-33 92.5 2838 97.3 3007 98%
                  215 Grain Hodgdon H1000 83.5 2793 87.7 2932 98%
                  215 Grain Norma 217 87.0 2823 91.6 2971 103%
                  215 Grain Hodgdon Retumbo 87.0 2828 91.7 2974 101%
                  215 Grain Viht. N570 88.0 2847 92.8 3018 98%
                  Rate now:
                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  Re: 300 Norma Mag Load Data
                  01/27/2015

                  Here is Berger's data for either of their 230gr pills:


                  .300 Norma Magnum
                  230 Grain, PN: 30428 Bullet, CIP 3.680" COAL, 26" Barrel. 1/6/2015 RB
                  Bullet Powder Start Load In Grains Approx. Start Velocity Max. Load In Grains Approx. Max. Velocity Fill Ratio
                  230 Grain Alliant RE 25 78.0 2695 82.3 2821 93%
                  230 Grain Hodgdon Retumbo 84.5 2735 89.1 2874 100%
                  230 Grain Hodgdon US 869 94.0 2669 99.2 2844 105%
                  230 Grain Hodgdon H50BMG 90.0 2682 94.7 2848 105%
                  230 Grain Alliant RE 50 93.5 2736 98.6 2913 103%
                  .300 Norma Magnum
                  230 Grain, PN: 30110 Bullet, 3.680" COAL, 26" Barrel. 4/7/2014 RB
                  Bullet Powder Start Load In Grains Approx. Start Velocity Max. Load In Grains Approx. Max. Velocity Fill Ratio
                  230 Grain Ramshot Magnum 80.5 2626 84.5 2749 87%
                  230 Grain H-1000 80.0 2654 84.1 2786 95%
                  230 Grain VIHT N570 79.0 2533 88.1 2850 94%
                  230 Grain RE-33 88.5 2704 93.2 2865 96%
                  Rate now:
                  lapua50XPrivate
                  Rating: 0.0/5 this site
                  11 posts this site
                  Re: 300 Norma Mag Load Data
                  02/24/2015

                  Hi there guys



                  i loaded up 230 berg in my 300 NM with H1000 84.1 got av 2900 fps very tight group at 100m



                  though using NORMA brass using 215 Feds I noticed after 1 and 2 firings 2 of the relaoded brass the 215 where loose .



                  set my die FL sizing die to match as close as possible the gun chamber is it the brass pressures are good fr this load any ideas anyone ?

                  Rate now:
                  MonstaPuggernautXPrivate
                  Rating: 0.0/5 this site
                  3 posts this site
                  Re: 300 Norma Mag Load Data
                  03/16/2015

                  Yahtzee. I'm glad I found this thread.

                  Rate now:
                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  Re: 300 Norma Mag Load Data
                  03/21/2015

                  Out shooting this AM. Great load that shot in the .3's, but it's pretty hot:

                  Norma brass

                  215gr Berger hybrid

                  90gr N570

                  FGMM 215 primer

                  3185fps average over 5 shots w/ slight ejector marks from a 28" Bartlein med palma.



                  Rate now:
                  grunklXPrivate
                  Rating: 3.0/5 this site
                  5 posts this site
                  Re: 300 Norma Mag Load Data
                  04/05/2015

                  I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.

                  My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.

                  Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?

                  The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!

                  Grunkl

                  Rate now:
                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  Re: 300 Norma Mag Load Data
                  04/07/2015
                  grunkl wrote:
                  I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.

                  My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.

                  Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?

                  The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!

                  Grunkl

                  Without running the thread off topic too much, I'd say go with Defiance Deviant action. Word to the wise: Nosler is a little overly enthusiastic about the Accubond LR bullet BC's. Do a Google search regarding the accuracy of their advertised BC's. Litz published some info on it.

                  Rate now:
                  Idahohorseman

                  XGunny Sergeant
                  Rating: 3.4/5 this site
                  627 posts this site
                  Re: 300 Norma Mag Load Data
                  04/08/2015
                  jonthomps wrote:
                  grunkl wrote:
                  I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.

                  My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.

                  Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?

                  The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!

                  Grunkl

                  Without running the thread off topic too much, I'd say go with Defiance Deviant action. Word to the wise: Nosler is a little overly enthusiastic about the Accubond LR bullet BC's. Do a Google search regarding the accuracy of their advertised BC's. Litz published some info on it.

                  Yesterday, I finished up developing the lo0ad for my BAT Machine actioned long range hunter 300 NM. Wicked accurate and easy to find a load.... Berger 230, Retumbo 86 gr., FGM magnum, 2973 fps out of a 24" suppressed Broughton.... hole in hole accurate at 100M. tomorrow I will stretch it out to a thousand. I am confident it will do well.



                  Rate now:
                  nnnn16XCorporal
                  Rating: 0.0/5 this site
                  72 posts this site
                  Re: 300 Norma Mag Load Data
                  04/26/2015

                  230 Berger OTM .719

                  85.4 of H1000

                  Norma Brass

                  Fed nonmatch primers

                  22" barrel

                  last 100 yd string was 2867, 2867, 2867, 2853, 2862 and they were all in 1 hole

                  This rifle has been amazing. Consistent 1000yd groups between 5 and 6 inches. I finally found a spot to shoot the mile (1762) and when we finally went the wind was wildly inconsistent but I had 1 of 13 on target. There was zero splash visible so I'm certain it'll be better next time. I'll take one at a mile considering this rifle represents my first try at long range, first try at reloading, first try at cutting a chamber and building a rifle, first try at a bolt gun actually.

                  I have had a problem with the brass. About one of every 3 cases won't rechamber in the rifle. They will but I have to really fight to get the bolt closed. Any tips or logic that someone could provide would be extremely helpful.



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                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  Re: 300 Norma Mag Load Data
                  04/27/2015

                  It seems like brass life is a common complaint of the 300NM. Speed costs. I'm pushing mine pretty hard and it looks like 3 reloads is all she's gonna give me. If Lapua came with brass (or if someone else like RWS made some tough brass) we'd all be in heaven.

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                  ugsly308XSergeant
                  Rating: 3.1/5 this site
                  245 posts this site
                  Re: 300 Norma Mag Load Data
                  06/19/2015
                  nnnn16, have you tried bumping the shoulder back just a tad? I run mine thru a redding body die and havent had any problems with it. Dont force it, you'll end up galling your lugs. You want them to chamber like butter.

                  Casey
                  Rate now:
                  rowen99XSergeant
                  Rating: 3.1/5 this site
                  170 posts this site
                  Re: 300 Norma Mag Load Data
                  07/10/2015

                  83.0 grains of Retumbo
                  Fed 215M
                  230 Berger
                  10Twist
                  26"
                  2897 FPS
                  Verified at 1287 yards

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                  jonthompsXFirst Sergeant
                  Rating: 3.5/5 this site
                  2098 posts this site
                  Re: 300 Norma Mag Load Data
                  07/23/2015

                  88.0gr N570 & 215FGMM
                  3.600" OAL
                  215 Berger hybrid
                  1-10" twist
                  28" barrel
                  3150fps avg

                  What a hammer! No pressure signs and extremely accurate. Shot several sub 1" groups at 356y.

                  photo 1719CB23-5A76-422E-AB69-8F9C9656D329_zpsjbe6onib.jpg
                  Sure would love more info on this lefty rifle. That’s the chassis I wanted for my 300 Norma build, but had to go a different route since they said it couldn’t be done.

                  Comment


                  • #59
                    Is anybody using the hornady brass?
                    I've been running the norma brass but I'm tired of the donut at the bottom of the neck and I'm tired of reaming out the primer holes so I can seat the primer.
                    Is the hornady stuff any better about this, or do I just need to quit whining?
                    NNNN
                    Excellent Transactions With; 7mmRM, Rthur, lordt313, skinz0021, TXMARINE, NTRP-CKA, ASM-1, Vette447

                    Comment


                    • #60
                      Originally posted by rem `06 View Post
                      did anybody get their brass from Clint? I saw his post was from June? I just got a new stock on my 300NM and heading to the range tomorrow with 210 Berger and RL-33
                      Signed up and he emailed me once, but haven't heard anything since.
                      Those who are merciful to the cruel, are cruel to the merciful. - Talmud

                      Comment


                      • #61
                        Originally posted by WtxShooter View Post
                        Sure would love more info on this lefty rifle. That’s the chassis I wanted for my 300 Norma build, but had to go a different route since they said it couldn’t be done.
                        Sold it to a local Kansas City shooter. I bought it from Mile High. I'd give them a call if you're looking for a lefty AI chassis. Or there is a J. Allen lefty chassis for sale at 3rd Gen Shooters Supply.
                        Those who are merciful to the cruel, are cruel to the merciful. - Talmud

                        Comment


                        • #62
                          Trentech 300 Norma Mag Improved .

                          Maddco 9 twist 27 inch
                          Trentech Taipan custom brake
                          85 grains of 2217 ( H1000)
                          CCI 250 primer
                          215 Berger on lands
                          3084 fps average
                          ES. = 4 fps SD = 1.4 / 5 shots .
                          Group is right on 0.2 for 5 shots .

                          This is my gunsmiths rifle , I have the same chambering in a Bartlein
                          9 twist , in an XLR chassis with a Terminator T4 brake . My ES was
                          similar but only 3 shots as I’m conserving barrel life . The Trentech
                          Taipan brake is much nicer to shoot than the Terminator T4 : similar
                          recoil reduction to the T4 with much reduced concussion / blast effect
                          at the shooters position .

                          We had issue with hang fires using the BR2 primers we had lying around .
                          Swapping to 250 Magnum primers eliminated the hang fires and got ES
                          down from the 30’s to 20 or so .

                          The biggest benifit to ES and group size was annealing the brass with
                          the AMP annealer from NZ . This annealer is fantastic : the numbers on
                          the Labradar ( see photo evidence ) and the group size doesn’t lie . As a
                          result of this test , I’m annealing every centrefire case every loading , with
                          the exception of my ancient Enfield which I shoot with irons .

                          EDIT : there is a very nice node around 89 to 91 grains , but with Norma brass
                          it is not usable in this application . Trentech Engineering is looking at a system
                          to re-size 338 Lap Mag brass to 300 Norma Improved : a lot of work but maybe
                          a solution to run the higher node . Really hoping Petersen Brass can help us
                          out soon with a better case to work with !
                          Last edited by Clearlight; 11-07-2017, 08:15 PM.

                          Comment


                          • #63
                            Has anyone used the new hornady brass yet?

                            Comment


                            • #64
                              Tag

                              Comment


                              • #65
                                Originally posted by Clearlight View Post
                                Trentech 300 Norma Mag Improved .

                                Maddco 9 twist 27 inch
                                Trentech Taipan custom brake
                                85 grains of 2217 ( H1000)
                                CCI 250 primer
                                215 Berger on lands
                                3084 fps average
                                ES. = 4 fps SD = 1.4 / 5 shots .
                                Group is right on 0.2 for 5 shots .

                                This is my gunsmiths rifle , I have the same chambering in a Bartlein
                                9 twist , in an XLR chassis with a Terminator T4 brake . My ES was
                                similar but only 3 shots as I’m conserving barrel life . The Trentech
                                Taipan brake is much nicer to shoot than the Terminator T4 : similar
                                recoil reduction to the T4 with much reduced concussion / blast effect
                                at the shooters position .

                                We had issue with hang fires using the BR2 primers we had lying around .
                                Swapping to 250 Magnum primers eliminated the hang fires and got ES
                                down from the 30’s to 20 or so .

                                The biggest benifit to ES and group size was annealing the brass with
                                the AMP annealer from NZ . This annealer is fantastic : the numbers on
                                the Labradar ( see photo evidence ) and the group size doesn’t lie . As a
                                result of this test , I’m annealing every centrefire case every loading , with
                                the exception of my ancient Enfield which I shoot with irons .

                                EDIT : there is a very nice node around 89 to 91 grains , but with Norma brass
                                it is not usable in this application . Trentech Engineering is looking at a system
                                to re-size 338 Lap Mag brass to 300 Norma Improved : a lot of work but maybe
                                a solution to run the higher node . Really hoping Petersen Brass can help us
                                out soon with a better case to work with !
                                Is this 30° IMPROVED?

                                Comment


                                • #66
                                  Originally posted by SleepDoc View Post
                                  Has anyone used the new hornady brass yet?
                                  I just received a box of 20 from Cabelas (their last box.) my initial impressions are very positive. The rounds are packed in a box/cartridge holder similar to production Ammo allowing the box to hold the loaded rounds, a nice touch. The length of the cases was very uniform throughout the 20 and finish was nice. I ran my mic. around all and they were very uniform. The primer pockets were nice and tight, maybe a bit tighter than the Norma. I basically case sized the neck, barely changing it at all and loaded some 198 Flatlines. All loaded rounds fit in the box nicely. Overall my initial impressions are nothing but positive. I just loaded 60 using virgin Norma brass and would say it compares very favorably.

                                  My Gunsmith just sent me an email noting my rifle has been completed and should ship this week. I have 100 of the ABM 215 and 230 as they were on sale for about the price of brass alone. Almost time for Christmas.

                                  Comment


                                  • #67
                                    Well I finally got everything in and assembled my 300 NM a few weeks ago and was able to get her out over the Thanksgiving break and fire the first few rounds down range with it. After a 100 yard zero on the scope, immediately took it out to 626 yards and am happy to say it was even better than anticipated! Rifle was laser accurate and recoil was much less than expected. Rifle is honestly a ton of fun to shoot. Obviously not the cheapest round to shoot at all, but well worth the money if you ask me. Definitely eager to get some personal load data on it, but I will plug a friends ammo company and say that the Cold Zero ammo that I have for it is amazing as can be. Highly recommend it for this cartridge for sure! As far as the rifle, it was built by Texas Custom Rifles, and I must say, Travis does excellent work. Here are the specs...

                                    1:10 twist barrel 24"
                                    Stiller Tac 338 action, Lefty of course.
                                    Timney trigger
                                    Cadex Field Tactical chassis
                                    NF ATACR 5-25x56 F1 scope

                                    Comment


                                    • #68
                                      Originally posted by bjay View Post
                                      Is this 30° IMPROVED?
                                      35 deg bjay . Shoulder starts approx 0.110 further up the case
                                      than standard 300NM . Reamer is my gunsmiths design , ( Trentech
                                      Engineering ) . Super accurate and great ES , just not quite
                                      the velocity with Norma brass . Petersen brass should get us in
                                      the high node , and add up to 100 fps .

                                      Comment


                                      • #69
                                        Originally posted by Clearlight View Post

                                        35 deg bjay . Shoulder starts approx 0.110 further up the case
                                        than standard 300NM . Reamer is my gunsmiths design , ( Trentech
                                        Engineering ) . Super accurate and great ES , just not quite
                                        the velocity with Norma brass . Petersen brass should get us in
                                        the high node , and add up to 100 fps .
                                        When Peterson brass going to be avail sir?

                                        Comment


                                        • #70
                                          ^^ Early next year possibly , from previous posts on
                                          this forum . Not confirmed from Petersen yet .

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