300 PRC update

Buzzbait

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Mar 13, 2018
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What twist to best stabilize 220-250 grain bullets?
ditto above for Hornady 250gr A-tip, Hornady claims they are more tolerant of twist rate I'm working with the Sierra 230gr pointed Matchking #2251, Sierra recommends 1/8". I selected a 1/8" for my 300PRC, the 230gr MK did very well out to 1774 yds, only 17mils elevation with avg 2837 fps at muzzle.
 

LakuNoc

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Jun 13, 2018
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1-9 should work with 230 gr. Pass 230 not sure if 1-9 can stabilize.
 

Dippy

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Both of my 300 PRC builds are 9 twist. One is a target rifle for shooting 225-230. The other is a tactical hunting rifle shooting 210-220 hunting bullets.

Shooting from sea level to 3400’
 

gnochi

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Just got the confirmation from Bartlein that my 1:10-1:6 30in LHGT barrel is ready and being shipped. Can’t wait!

Side note, how deep are people loading 198 flatlines in 300PRC? Is there any hope for loading to mag length? cc @Dan Warner
 

Dippy

So damn confused
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Just got the confirmation from Bartlein that my 1:10-1:6 30in LHGT barrel is ready and being shipped. Can’t wait!

Side note, how deep are people loading 198 flatlines in 300PRC? Is there any hope for loading to mag length? cc @Dan Warner
That ought to be an interesting set up lol
 

Ledzep

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250 will stabilize in a 9 twist unless you're shooting it on the Alaskan coast in the winter.
 
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verdugo60

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Selling my 300 build if any of you are interested. Didn't get to shoot it, brand new 1/9 twist PROOF barrel. Great long range hunter.
 
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LakuNoc

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Wondering how much of a jump there is running Hornady 230gr A-Tip.
Using regular Magazine length. Or should i just go for 3.850 mag length?
Thank You
 

ErikJS

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Sep 17, 2019
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Hi, new to the forum & interested in the .300 PRC! I will be in the US in November and want to pick up a Redding Die Set. I have found the "77776 Redding CUSTOM Type-S FL Bushing Size Die 300 PRC", but I cannot find a seating die with micrometer. According to Redding it is released, it's called the 300 prc competition seater die part #55776. But I can't find this anywhere (including the imho horrendous Redding website)...
 

jd5521

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Feb 21, 2017
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Hi, new to the forum & interested in the .300 PRC! I will be in the US in November and want to pick up a Redding Die Set. I have found the "77776 Redding CUSTOM Type-S FL Bushing Size Die 300 PRC", but I cannot find a seating die with micrometer. According to Redding it is released, it's called the 300 prc competition seater die part #55776. But I can't find this anywhere (including the imho horrendous Redding website)...
Email Redding. They will recommend one or two dealers to order through. Contact the dealers and tell them what you are wanting to do. They will order the dies and hold them for you.
 

b2lee

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I just noticed that Little Crow Gunworks has a 300PRC chamber for the WFT2. I don't see myself processing 1000's of pieces of brass for 300PRC...but it is nice to see 300PRC options on the market. I ordered one just because. I know when I processed the unfired Hornady brass...it was really long.
 
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Throat Toaster

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Sep 19, 2019
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This is a 65mm case, long action the 6.5 PRC is, ostensibly, a short action cartridge.
This is basically the 7LRM, but in .30 cal. This is what the new sniper rifles SHOULD have been chambered in, instead of .300 WM (approx 5 grains more capacity in the same envelope).

More ass than the .300 WM, less than the ultra-mags and Nosler offerings. Same .532 boltface as standard magnums just no retarded belt.
I was doing my own version in 2009 by sizing a 375 Ruger case with a 300 RCM die. My goal then, was to utilize the space that the belt wastes. A divorce prevented me from ever finishing mine, and I give up messing with rifles all together. Just started getting back into it this year, I was pleasantly surprised when I seen the .300 PRC for the first time. My first thought was "at least an ice queen didn't ruin someone's plans" lol
 

Throat Toaster

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Sep 19, 2019
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Just got the confirmation from Bartlein that my 1:10-1:6 30in LHGT barrel is ready and being shipped. Can’t wait!

Side note, how deep are people loading 198 flatlines in 300PRC? Is there any hope for loading to mag length? cc @Dan Warner
Am I understanding this correctly? It's a 1:10 at the throat and progresses to a 1:6 towards the muzzle?
 

wspe1

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Does anyone know if other manufacturers besides Hornady will produce the 300 PRC and the 6.5 PRC factory ammunition? If not how long would another manufacture such as federal take to start selling factory loads?
 

TripleBull

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I'd like to see Berger load 300 PRC but I won't hold my breath. The Berger 338 LM with the 300 grain OTM is a very good value. I'm seeing SDs less than 10. The Hornady ELDMs in 300 PRC are running SDs around 18 or 19.
 

man32ahan

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Question all, I’ve read this entire thread but still don’t feel super confident. I’m gonna have a stock inletted with DBM for 300 PRC.
Will be shooting the factory 225 Eldm.

Do I need 3.775 or 3.850 DBM? And what magazine? Thanks in advance.
 

gnochi

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Question all, I’ve read this entire thread but still don’t feel super confident. I’m gonna have a stock inletted with DBM for 300 PRC.
Will be shooting the factory 225 Eldm.

Do I need 3.775 or 3.850 DBM? And what magazine? Thanks in advance.
You want the 3.850 length magazines (COAL 3.78ish) for 300WM, which both MDT and Accurate make. Alternatively you can get 3.850 338LM magazines and a feedlip adjustment tool.
 

man32ahan

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You want the 3.850 length magazines (COAL 3.78ish) for 300WM, which both MDT and Accurate make. Alternatively you can get 3.850 338LM magazines and a feedlip adjustment tool.
Thank you so much. As far as the bottom metal just make sure it’s CIP? What’s a good brand to use for Remington 700? Badger seems out stock. What’s my next best options.
 
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NVScout

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I posted in the PX but I’ll put it here as well .... looking for a proof 300 PRC prefit (shouldered) for a SR3/TL3 ! Hit me up if you know of anyone parting out . Thanks
 

TripleBull

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That may be good ammo but it uses Hornady brass and is $127 a box. The Berger 338LMs are $83 a box, use Lapua brass and are very consistent for factory ammo. The Hornady ELDM isn't bad - ~$40 a box, SDs run between 15 and 20. Handloading is the best option but I am not ready yet, too much life going on. I'll get it together this winter.
 

Rocketmandb

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Thought I'd give an update on my 8x68S brass adventure.

- I decided to try out Berger 230s. Me likee.
- I ran them at 10 off the lands and think I found my load with RL-26. Remember that the case has a little less volume than Hornady.
- 72 gr of RL-26 gave me 2849 fps average, an ES of 6 and an SD of 2.6 over 5 shots.
- Will be heading out this weekend to validate the load some more.
 

stereo.pete

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Folks I'm getting excited, so my ARC Archimedes long action should be arriving in the next few weeks, and I just received my invoice from Manners for my T4A-Team with CIP DBM Mini-Chassis. Barrel is already in house, just waiting for the action before I contact @DAVETOOLEY and send it in for chambering. Barrel is a Bartlein 1-9 twist, looking at 28" in finished length.
 
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b2lee

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My Bartlein 1-9tw at 28" finished....is stabilizing the 230gr A-Tips very well.....with 78.5gr of Retumbo...at 900+ ft of elevation...60% humidity...80F....while standing on my left leg only and holding my lip to the right.

you think you are excited now?....just wait until you pull that trigger :)
 
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NVScout

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I just put together a 300 prc on a bighorn and am starting to research what bullets are ideal in a sammi chamber in regards to case depth. I saw a picture of a 215 hybrid and at .020 off it seems like very little bullet in the neck. I have a Wyatt’s 3.850 box so I don’t think coal will be an issue .... can any one post some pictures of the 215-230 range bullets and where they sit in the case mouth ? Any starting points for loads would be greatly appreciated as well !!
 

Rocketmandb

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About to buy that same set , what bushings did you get ?
I bought the hydro die to form 8x68S (the die on the left with the water bottle) and the custom die because I'm having consistency issues with the Hornady die I've been using.

For the 8x68S, I use a .341 bushing to do the first sizing, then I ream out the inside of the neck to get rid of the extra brass that got forced in there from the sizing, then I use a .336 to get .002" of neck tension for the final. I've got two videos on YouTube showing how to do all this. Honestly, it's very easy to fire form 8x68S, and the RWS brass I use is much, much more consistent than Hornady and lasts a lot longer.

I actually have a full set of 30 cal bushings going from .329 to .341.
 
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Dschapp44

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Oct 15, 2018
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I went the 300 PRC improved by rich Sherman route. It’s been talked about earlier but just got time to do a ladder with the 215 Berger’s. No pressure at 3100fps using H1000
Just loaded up a 230 OTM on the left, coal of 2.630 and a 230 SMK on the right with a coal of 2.750. They look like sewing needles
 

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Kiba

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Somewhat random question... anyone with a 300 PRC build using an action with a large firing pin (.078"-0.080") experiencing primer cratering?

I'm going to spin up a 300 PRC barrel for my AXMC which has a large firing pin, and I'm wondering if I should have LRI bush the bolt and turn the firing pin down to 0.062" before I have a barrel chambered just to avoid the possibility of any cratered primers.