Data for ALL Cals Ackley Imp

Mar 8, 2011
8
0
1
37
Wichita, Kansas
#53
Re: Data for ALL Cals Ackley Imp

25-06 ack 26.5" Pacnor
fireform 43.0 gr varget
90 gr sierra bthp
Nosler 270 brass
Rem 9.5 primer
Jamd. .015

Deer load
56.5 H4831sc
100gr TSX
Nosler 270 brass
Rem 9.5
Jamd. .010
 

ollie

Sergeant
Nov 10, 2008
526
0
16
45
Apollo Pa
#54
Re: Data for ALL Cals Ackley Imp

260 ackley
nosler brass fireformed with cow.
fed gold metal primers
140gr a-max
h4350 43.5grains
2860fps
 

ranger1183

Gunny Sergeant
Jul 18, 2006
3,098
0
36
Whitefish, MT, USA
#57
Re: Data for ALL Cals Ackley Imp

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: StanwoodSpartan</div><div class="ubbcode-body">More loads for the 6ai?? How bout anyone shooting the 115DTAC's with H4350? </div></div>
personal opinion but for a big case like the 6mm Remington with a small .243 neck pushing a very heavy 115 grain bullet, I'd look at the slow powders like H4831sc, H1000 and Retumbo.
 
Apr 3, 2009
888
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#58
Re: Data for ALL Cals Ackley Imp

280 Ackley Improved...

This is my first go-around with an Ackley round.
Brux, 26", 1-9 twist, Oehler Chrono 8 feet from muzzle.
1200' elevation, 97-105 degrees, about 25% humidity.

Fire-forming load, 280 rem brass, CCI 200 primer, H4381SC, Hornady 162 BTSP interlock bullet. Velocity is average of 5 rounds.

51 gr, 2472 fps, SD: 19
52 gr, 2515 fps, SD: 20
53 gr, 2591 fps, SD: 27
53.5 gr, 2604 fps, SD: 30
54 gr, 2641 fps, SD: 30
54.5 gr, 2680 fps, SD: 17

All the loads shot within 1 MOA except the 53 gr load and I had a lot of barrel mirage. I'm not happy with the SD numbers, but it is fire-forming so.....

I resized the 280 AI brass, bumped shoulder back .002" I decided, for no particular reason to try the Sierra 175 SMK. I again chose H4381SC from recommendations by others. I decided to jump these .020 and will get closer to the lands as I go. I also loaded 5 differing charge weights among the 50 rounds, but I loaded 5 rounds with a 200 primer and the other 5 with a 250 magnum primer for each charge. 1200' elevation 35%humidity, 97-103 degrees. Oehler chrono 8 ft from muzzle.

55.0gr, 200 primer, ES: 41, Vel: 2641fps, SD: 20, group: 0.679 MOA
55.0gr, 250 primer, ES: 34, Vel: 2673fps, SD: 12, group: 0.593 MOA
55.5gr, 200 primer, ES: 24, Vel: 2684fps, SD: 10, group: 0.636 MOA
55.5gr, 250 primer, ES: 51, Vel: 2693fps, SD: 20, group: 0.951 MOA
56.0gr, 200 primer, ES: 29, Vel: 2697fps, SD: 13, group: 0.468 MOA
56.0gr, 250 primer, ES: 33, Vel: 2724fps, SD: 13, group: 0.593 MOA
56.5gr, 200 primer, ES: 13, Vel: 2734fps, SD: 05, group: 0.543 MOA
56.5gr, 250 primer, ES: 71, Vel: 2770fps, SD: 27, group: 1.201 MOA
57.0gr, 200 primer, ES: 35, Vel: 2755fps, SD: 13, group: 0.784 MOA
57.0gr, 250 primer, ES: 52, Vel: 2781fps, SD: 21, group: 1.097 MOA

The 57.0gr load looks like the primer is starting to flatten, but no other signs of pressure. What velocity should I be getting with the 175SMK? I was thinking tops would be around 2875fps... Thoughts?

I was thinking of doing the same type of test, but jumping the 175SMK .010 and beginning with 56.5 and work my way up to around 58.5 or until I see some pressure signs... Thoughts?
 
#59
Re: Data for ALL Cals Ackley Imp

With a quality barrel like that, run the charge up until you see signs of too much pressure then back off .3-.5 grains then play with your seating depth. I haven't found a reasonable charge weight shooting 168 bergers or 162 Amax's that I couldn't tweak the seating depth to get them to shoot sub 1/2 MOA.

I'm running 61.5 grains 4831SC with the 162 Amax's btw and they are right around 3000 fps if not a little under. Never messed with the SMK's (yet).

Mike
 
Apr 3, 2009
888
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4 8 0
#61
Re: Data for ALL Cals Ackley Imp

Shot some more 280AI same weather conditions and elevation. Same shootin-rig too, of course. Oehler @ 8 feet. 5-shot groups, etc. blah, blah blah.

Jumpin' the 175's 0.010, H-4831SC, CCI 200/250 primers and 175 SMK

57.5gr, 200 primer, had previous data in chrono so no data, group: 0.716 MOA
57.5gr, 250 primer, ES: 09, Vel: 2774, SD: 04, group: 0.605 (4 in one hole last shot doubled the group size).
57.8gr, 200 primer, ES: 66, Vel: 2778, SD: 25, group: 0.548
57.8gr, 250 primer, ES: 22, Vel: 2798, SD: 08, group: 0.564
58.1gr, 200 primer, ES: 29, Vel: 2784, SD: 13, group: 0.318
58.1gr, 250 primer, ES: 29, Vel: 2814, SD: 10, group: 0.386

Looks like the recipe is getting better. But, I've decided to go with the 162 Amax, so all load data after this post will be on that bullet.
------------------------------
For the next 20 rounds, I tried Hornady's Superformance since it was next on the burn-rate chart. All I can say is... wow. Same bullet, same 0.010 jump.

55.0gr, 200 primer, ES: 115, Vel: 2782, SD: 47, group: 0.545
55.0gr, 250 primer, ES: 68, Vel: 2800, SD: 28, group: 0.761
55.5gr, 200 primer, ES: 62, Vel: 2806, SD: 30, group: 0.711
55.5gr, 250 primer, ES: 63, Vel: 2803, SD: 29, group: 0.851

No, the ES numbers are not a typo. The groups opened up initially because the firing pin began sticking/hanging a little. It felt like there was a delay from the time I pulled the trigger and the firing pin struck the primer. Had another shooter drive and he experienced it too. We disassembled the bolt, cleaned up some excess oil and it was again operating normally. Needless to say, I was impressed with the Superformance's velocity, but that was where the good impression stopped. Guess I have some fire-forming powder.

No pressure signs in any of these loads.
 
Aug 16, 2007
246
5
18
42
OKC
#62
Re: Data for ALL Cals Ackley Imp

243 AI w/ 1 in 8" twist
45 RE 22,
107 Sierras
CCI BR primers

243 AI w/ 1 in 7.5" twist
50 gr Retumbo
115 VLD's
CCI BR primers
 

kskevin

Sergeant
Jun 13, 2010
185
0
0
50
Cincinnati
#63
Re: Data for ALL Cals Ackley Imp

Call Gunstop 1-800-645-7644. Not showing on their website but it is in their catalog and I bought both Vol I & II for about $40 total.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dogman243</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Powder Burns</div><div class="ubbcode-body">
</div></div>wish i could find a copy of both volume 1 and 2! anybody know where i can get one </div></div>
 
Jun 13, 2010
185
0
0
50
Cincinnati
#64
Re: Data for ALL Cals Ackley Imp

280 AI
24" Bartlein 1/8.7
Hornady 162g AMAX
57.0g IMR4831
Nosler brass
F210
seated -0.020" off lands
2925 fps

280 AI
24" Bartlein 1/8.7
Berger 168g VLD
59.2g H4831sc
Nosler brass
F210
seated -0.070" off lands
2811 fps
 
Aug 28, 2011
36
0
0
42
Pa
#65
Re: Data for ALL Cals Ackley Imp

6mm AI rem case 52.5 grain Imr 4350 ,remington 80 grain hp,rem 9 1/2 primer 3700 fps. same thing with sierra 85 grain shoots but shows too much pressure.51.5 imr 4350 with horn.87 grain bthp 3590 fps. remington 722 with a 22 inch hart barrel
 

SVG308

Sergeant
Jan 4, 2010
182
9
18
33
KS
#66
Re: Data for ALL Cals Ackley Imp

260AI
28" Criterion 8tw
140 AMAX
Fireformed Lapua Brass
210M Primer
47.5g H4831SC
.015 off lands (2.215 for my rifle)

I believe its running 2925 backing into it from impact at 800 yards.
 
Apr 1, 2009
347
2
18
40
Montague, Texas, USA
#67
Re: Data for ALL Cals Ackley Imp

I am looking for a few pieces of either 6mm AI or 257 Roberts AI brass. I need at least 6, but no more than 10. These can have bad primer pockets as I won't be loading them to shoot. I am trying to test magazine function for a project.

Thanks,

Adam
 

mscott

Gunny Sergeant
Oct 10, 2007
1,394
0
36
Central Ohio
#68
Re: Data for ALL Cals Ackley Imp

I just put together an 8 twist 22-250AI with plans to use 80 grainers. My fire forming load is:

80gr Nosler Custom Comp
37.0gr of H4350
Win brass
WLR primer
 

Nortex

Sergeant
Jun 2, 2010
868
31
28
WF, Texas
#70
Re: Data for ALL Cals Ackley Imp

7mm-08 AI 22" Krieger 1:10 twist.

Win formed brass
47.5gr H Varget
120gr Nosler BT's
win LRP
running 3350 with chronograph about 7yrds from muzzle.

This load worked to get through hunting season, I'm now in the process of working on 162Amax load now.

The 162's show substantially more promise and initial tests with varget and 4350 both are proving very accurate. With Varget velocity is 2700 with 41.5gr with room to come up and with 4350 2580 with 45.1 also no pressure but fairly compressed.
 
Sep 26, 2010
40
0
0
54
Hermantown MN
#71
Re: Data for ALL Cals Ackley Imp

280AI.
26" three groove SS PacNor.
Nosler 280AI brass, neck sized in a LCD.
WLR.
162gr Amax seated to the lands.
64 gr Magpro.

3050fps @15'

No pressure signs and QL estimates 62Ksi.

Safe in MY rifle.
 
Apr 19, 2012
12
0
0
28
United States
#73
300 AI

300 AI
28.5 in Broughton Barrel
Black Hills Brass
2820 Fps
220 SMK
71 Gr RE 22
.1 off the lands
.25 MOA

Same Rifle
Black Hills Brass
3042 Fps
220 SMK
80 Gr H1000
.1 off the lands
.33 MOA

Same Rifle
Black Hills Brass
2982 FPS
220 SMK
71.2 4000 MR
.1 off the lands
We will see tomorrow at 1000 Yards.

C

 

BillCh

Sergeant
Aug 1, 2010
151
0
0
59
Pacific Northwest
#74
Re: Data for ALL Cals Ackley Imp

223 AI
Savage LRPV
26"Brux, 1-8 HV, .253 Neck, .077 Freebore

75 gr. A-Max
Lapua, fire formed, trimmed to 1.743", 3x fired, .248 neck bushing.
CCI BR-4
24.9 gr. IMR 8208 XBR
COAL 2.500, (.020 off lands<span style="text-decoration: underline"> in my chamber</span>)

Come-ups from 100 to 200 yds. jive with a QuickLoad MV prediction of 2965.
Temp, 68 f, Alt., 1200 ft.
Best load so far with this bullet, <3/4" at 200. I will load more and shoot through the chrono.
 

ccoker

Gunny Sergeant
Jul 2, 2008
1,202
15
38
Central Texas
www.tacticalgunreview.com
#77
280AI
Nosler TGR rifle
24" 1/9 Pacnor
Nosler brass
Fed match primers
140 Accubond
3.30 COAL (same as Nosler factory ammo)
59g IMR 4831
3066 FPS
500 ft above sea level
60 degrees

One hole group at 100
1" at 350
2" at 500

I know I can go hotter but this is so accurate and hammers deer and hogs..
 

MLC

Gunny Sergeant
May 4, 2004
1,074
0
36
Solebury, PA
#82
I was working with my 223 Ackley today with good results.
I have an APA trued 700 with an 8 twist 5C Broughton bedded in a McM Remington hunter stock by SAC, HDMR G2 @ 21x.
Ran all loads through my can, off a bipod at about 110 yards.
Sunny, intermittent 5-7mph breezes.

Hornady 75 Amax, hBN coated, 1x LC 09 brass, Wolf SR primer, IMR 8208 XBR 2.525 OAL which is into the lands pretty good in my rifle.

I was having some driver error, this powder really seems to want to shoot knots, so try not to wiggle.
I don't know if it was my can, but the cold bore shots tended to me .5-.75 moa outside of the subsequent group.
Those were discarded in the measurement as they were not indicative of the accuracy that followed.


5 shots 25.5g CTC .459" ATC .2"
4 shots 25.8g CTC .375" ATC .13"
5 shots 26g CTC .283" ATC .122"
5 shots 26.2g CTC .328" ATC .131"

Fireforming 24 grains IMR 4895 thrown from a Lee perfect powder measure 8 shots CTC .362" ATC .127"

The clear winner of the day, 26 grains:



These loads were not safe in Lapua brass.
I has several pierced primers and had to back down to 25.6 grains to approach the accuracy seen in the 26-26.2 range using LC brass.
The Lapua weighed 2.7 grains more than the LC and the powder was higher in the case with like charges.
 
Oct 8, 2012
561
77
28
47
Glendale, AZ
#83
For MY rifles:

.250 AI (.250-3000 or .250 Savage) Great kids/ladies gun. Fast, accurate, and recoil is minimal.

Remington brass
CCI 200 primer
44.0gr. H414
100 gr. Barnes TSX
.0060 off lands
23.5" Shilen barrel on Rem 700 SA BDL
3300 fps
.401" 5 shot @ 100 yds.

Remington brass
CCI BR-2 primer
44.4gr. H414
100 gr. SMK
.0050 off lands
3190fps
.304" 5 shot @ 100 yds.
Very low recoil and accurate. My new 1000 yd. steel ringing round.


.25-06 AI

Remington brass
CCI 250 Mag primer
60.3 gr. Alliant RL22
100 gr. Barnes TTSX
.0050 off lands
28" Lilja barrel on Rem 700 LA BDL
3598 FPS
.383" 5 shot group @ 100 yds.

Looking long and hard at building a .260 AI or 6mm AI for some long range shooting/medium range hunting. Need to figure out whether to go up or down in bullet diameter. I have .224, .257, .277, .284, .308 covered. I see two gaps in there....maybe fill both over time!
 
Last edited:
Oct 24, 2007
3
0
0
66
Texas Panhandle
#85
.338-06 AI

Win 30-06 fire formed
Nosler 210 Gr Partition
Rem 9 1/2
55.0 Gr IMR 4320
COAL 3.265"
2,743 feet per sec

Rem 35 Whelan fire formed
Sierra 250 Gr Spitzer BT
Rem 9 1/2
56.0 Gr IMR 4350
COAL 3.33"
2,436 feet per sec
 
Oct 11, 2009
270
0
0
57
Central Alabama
#86
30.06 Ai
Winchester brass fire formed
26" 1-10 Douglas barrel
Savage action
56.5 gr. reloader 19
Bullet .008" off lands
190 gr SMK
don't remember exact COAL
2795 fps 18 es
shoots 1/4 moa @ 100 holds 1/2 moa out to 1000 in calm conditions
 
Jan 26, 2013
222
0
0
43
#88
260 AI Data:

24" Krieger 1":8 barrel
142 SMK bullet coated with Boron Nitride
2875 fps muzzle vel. average
Vertical dispersion at 100 yds 0.27 inches
47.0 grains IMR 4831, which is a slight crunch load


I am wondering about trying Hodgdon V100 powder, I think I could make 2950 fps with it.
 
Jan 26, 2013
222
0
0
43
#89
Interesting new data from the range today, 78 degrees Fahrenheit, DA 1950 or so. The Magnatech chronometer gave me 2875 fps muzzle velocity (see earlier post). But on the range today I measured come-ups at 200, 300, 500, and 600 yards and entered these into Shooter. The adjusted velocity from Shooter tells me I have 3050 fps velocity.

It was a little (5 degrees) hotter today than on the day I zeroed, and I shot slightly faster today so the barrel temp was probably higher. SO, take all the velocities you read about with a grain of salt, as I think there are too many variables to make any meaningful comparisons. There could also be Magnatech or Shooter errors (or the loose nut behind the trigger errors).
 

Nortex

Sergeant
Jun 2, 2010
868
31
28
WF, Texas
#90
I've done a bit more playing with my 7mm- 08 AI with 162gr Amax's and Varget.

22" 1:10 twist 4 groove Krieger
Winchester formed brass
Winchester LRP
42gr of Varget
2.80 OAL

This load yields 2827fps. Accuracy is great out to a grand. I could load up to 2900fps but in 100 degree days after long shooting strings would give signs occasionally.
 

Paulh

Private
Mar 3, 2014
9
0
0
Western Washington
#92
338-06 AI (Freebored)
Interarms Mark X, Reformed Winchester-Western 30-06 Brass, 24" bbl

180gr Nosler BT
61 grains RL-12
Average Velocity: 3000 (ft/sec)
3.28" OAL
Win LR Primer
Winchester Western (WW) case


180gr Nosler BT
59 grains IMR 4064
Average Velocity: 2950 (ft/sec)
3.28" OAL
Win LR Primer
Winchester Western (WW) case


200gr Hornady
65 grains H414
Average Velocity: 2820 (ft/sec)
3.30" OAL
CCI 250 Primer
Winchester Western (WW) case


215gr Sierra
63.5 grains H4350
Average Velocity: 2760 (ft/sec)
3.34" OAL
Win LR Primer
Winchester Western (WW) case


225gr Speer SP
63.5 grains H4350
Average Velocity: 2680 (ft/sec)
3.34" OAL
Win LR Primer
Winchester Western (WW) case


250gr Sierra BT
61 grains H4350
Average Velocity: 2580 (ft/sec)
3.34" OAL
Win LR Primer
Winchester Western (WW) case
 
Apr 27, 2010
59
0
6
East Tenn
#93
.260 AI
My match load is 47.2 GR. RE 17 in Rem Brass with Rem 9 1/2 and Sierra 123s
Out of my 8.5 twist 29" Krieger barrel I get 3250 FPS. This is a really good barrel, and it shows. It's not unusual to get 3 round groups of 1/4" I've used this load to 1100 yards and have found it really easy to hit steel. Please note, this is a MAX LOAD in MY RIFLE. I know some folks will baulk at the Rem. Brass, I started out with Lapua, and at some of the matches, you don't have a lot of time to pick up brass... Hurts my feeling when I lost a piece of the expensive stuff, not when I loose the cheap stuff. Also, the Rem. Has slightly more capacity. I neck turn brass, and sort bullets. My load regime is nearly the same for my benchrest rifles. This has been an excellent round for most of the tactical matches I've participated in.
Guys, as with any Max data, please work up with caution!
Wayne
 
Mar 30, 2010
190
0
0
46
Palmetto State
#94
.260AI
142 grn Sierra MK 48.0 grns of H4831SC(slightly compressed) CCI BR LR primer Norma fireformed 260 brass yields 2940 ftps. Surgeon action, 26" Broughton 8.5 twist,barrel shot suppressed. bullet .015 off lands. Warm load please as with all load data work up with caution.

Wayne thank you for your data, wanted to try some 120s.
 
Last edited:
May 16, 2012
156
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61
#99
Clinto
I would start at 47.5g and work up. My 243AI has an 8t 28" barrel and with 50g of the H-1000 the 105 HyBred touching the lands is doing ave 3160 5 shot group with an sd of 8. I am still doing load work-up because I don't want to have to single feel when I have such a nice mag fed action. So we will see over the next few weeks if these Burgers like to jump. Best of luck with your "load chasing".....Rick