300 PRC update

18Echo

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So I can get a Bartlein 1-9 Heavy palma to finish at 30 or a Hawk Hill 1-9 to finish at 27... will the 3 extra inches make any significant difference?
 

Dippy

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Midway USA has Hornady 300 PRC brass. Just ordered 200 cases!
 

Dippy

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200 cartridges (1case)? Or 200 cases? (40K rnds???) Thats about $90k.

Did the free shipping code work for ammo?
I ordered brass, 4 bags of brass. 50 cases per bag. Free shipping worked for brass
 
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b2lee

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Yea...I got both the free shipping and the birthday code all wrapped up in one....I had a wish list of little odds and ends...so I got a bunch of stuff with the free shipping and birthday code....pre-ordered the seating stem for the A Tips as well.
 

Rocketmandb

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Another range report - this time with RL 33.

I did groups at 82.5, 83. 83.5, 84, and 84.5 grains of RL 33. None were particularly impressive .

The best from a spread perspective was 83 gr, which had a 19 ES and 7.9 SD with an average of 2862 fps. I might play around a little more around this load, but I'm not going to do too much more with this powder.

For anyone interested, here are the average fps of each load:

82.5: 2837
83.0: 2862
83.5: 2875
84.0: 2897
84.5: 2917

EDIT: I started getting mild compression loading at 84.0, and a little more at 84.5, which is why I stopped there.

I also played a little more with RL 26.

Best loads came out at 75.4 and 75.6.

75.4: Avg - 2970, ES 15, SD 6.2 - 5 shots
75.6: Avg - 2971, ES 10, SD 5.5 - 5 shots

Groups were hard to come by as the mirage was fierce. The 75.6 load was also one of my better ones from the last trip, so I think I'm going with this as the "champion" load for this powder. I'll also be playing a little on the lower end - probably high 73s to low 74s.

Also, I did another neck tension test, this time with RL 26. Again, the lower neck tensions did better. I'll be loading at .001 neck tension in this rifle with both H1000 and RL 26 from here on out.
 
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milanuk

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Is no one make micrometer style in-line (sleeved) seaters for the 300 PRC yet?

The links I've followed from this thread to places selling dies (actually in stock) all seem to be plain-jane seaters, not the Redding Competition / Forster Ultra BR style seaters. Or am I missing something...?
 

b2lee

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Is no one make micrometer style in-line (sleeved) seaters for the 300 PRC yet?

The links I've followed from this thread to places selling dies (actually in stock) all seem to be plain-jane seaters, not the Redding Competition / Forster Ultra BR style seaters. Or am I missing something...?
Personally, I'm contemplating buying a LE Wilson die blank and then sending it to my gunsmith and have him use the same reamer that he has chambered my barrel with....then again...I'll wait and see how accurate these Hornady match dies are....but alas...I need to actually shoot some first...and work up a load.
 

milanuk

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I've been kinda following along various threads on different forums... about had myself talked into replacing my low-mileage .300WM barrel with a .300 PRC... then read some of those threads thru, start to finish... now, between the one-brass thing and the relative lack of *good* dies (kudos to those loading with the Hornady dies, just not my flavor), I think I may run this thing til it dies and in the mean time, get barrel, reamer, brass, dies, etc. all ordered up along with a new chassis and give the old blaster a face-lift later in the year.
 

motofrog

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Personally, I'm contemplating buying a LE Wilson die blank and then sending it to my gunsmith and have him use the same reamer that he has chambered my barrel with....then again...I'll wait and see how accurate these Hornady match dies are....but alas...I need to actually shoot some first...and work up a load.
Wouldn’t you want a die reamer to be slightly smaller than a chamber reamer? Brass springback and all... just curious as I have no idea.
 
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b2lee

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Wouldn’t you want a die reamer to be slightly smaller than a chamber reamer? Brass springback and all... just curious as I have no idea.

Yes...but I'm just talking about using the reamer for making a bullet seating die with a mic top....after reading the previous posts..>I can see my error in getting that across.
 
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b2lee

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I've asked ADG about 300 PRC brass too.

On another note, anyone have an AMP and fire formed brass they can send to AMP for the AZTEC code? :D

I didn't notice this until now...but someone must have sent some 300 PRC brass in. As of May 7th you use 031 B for the Pilot Code...and download latest software ofcourse.
 
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Scrav223

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While patiently waiting for my Savage 110flp 300win to be rebarreled by Moon Roberts at crecent customs the 300prc was released, lucky me. I had him put a 26" M40 bartlien on it and I decided to switch it to 300PRC. I let him pick the twist rate and he talked to Frank at Bartlien who advised him go 1:8.5 twist. So I've broken it in with 225Hndy Match which shot about 3/4". Tested hand loads yesterday with 225ELDM H-1000 77.8gr max charge @2880fps
Best (3rnd) group was .300" at 20K off lands TL=2.680 but it showed pressure signs so I need to back it off.
My issue is I don't have CIP bottom metal so my best mag fed loads were 0.5" at a TL=3.630 and 77.8gr H-1000
More to follow soon👍
 
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Pho

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Brass available now. Hornady must have made a production run. Midway, Midsouth, and Precision Reloading showing in stock.

I'll pass and use what I got gambling that another company will soon make 300PRC brass. I have enough to get me into next year.
 

Ledzep

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Was able to get my barrel spun up this afternoon. Will start load dev/break-in next week, probably with 225 ELDM's. 1:9.5-1:9 gain twist, was able to finish at 31". I measured the groove dia. at the muzzle and it wasn't bell-mouthed as far as I could tell so I didn't cut the last inch off of the blank, maybe only 1/4" or so... If it doesn't group well I might try cutting it back.

Looking to run 230 or 250 A-tips. Will have to try both for velocity and see which wins out in the long run.


7079341
 
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b2lee

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Today I was cleaning some of my rifles and noticed that I have a Hoptic 2 round quiver on most of my rifles. I was like, "Oh yea, I'm going to need one for my 300PRC". Ofcourse nothing I have comes close to fitting in a 300PRC. So, a quick email off to Matt Stoner at HopticUSA to ask, "What quiver can I use for the 300PRC?".

Matt must have been checking his messages right then and there because it wasn't 30 seconds later I got a reply. He said he's going to do a production run in July of some 338 quivers and he will open up the mouth enough to fit in the 300PRC. I'm already ahead of you guys on the 'List'. If you guys are interested just email Matt stoner at HopticsUSA and let him know your interest. I figure anything we can do to help get accessories companies offer us options in 300PRC is a big help to those that follow behind us on this journey of the 300PRC.

Oh...and he did mention a 50 cal version to be released in June....I don't have a Fifty...but I may buy a quiver and mount it to the side of my 22lr target rifle to make some people shake their head at me at the local range.
 

TnDoc

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I just got my new 300 PRC ... been waiting for 5 months for it! it's built on an MPA ESR chassis with a Defiance action, a Hart 1/9 29 .75 inch barrel, a Yankee Hill suppressor, and a triggertech diamond trigger. It has been a tack driver, just got i zeroed and hit two small bull's-eyes at 500 yards. I intend for this gun to go out to over 2000 yards, and with the Valdada Recon G2 scope I have 35 mils of elevation!
 
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2Barrels

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You will want a 300WM CIP length magazine & bottom metal to ensure you have space with a 300 PRC.
New to this game. What, if any, mods need to be done to a Rem 700 LA Mag to use 300WM CIP mags and bottom metal? Any one care to provide a link for suitable bottom metal and mags? As I said, I'm new to this and confused as h3ll.
 

gnochi

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New to this game. What, if any, mods need to be done to a Rem 700 LA Mag to use 300WM CIP mags and bottom metal? Any one care to provide a link for suitable bottom metal and mags? As I said, I'm new to this and confused as h3ll.
Unless you already have an M5 inlet, you’ll almost certainly need to have the bottom of the stock opened up. The AICS mag is a bit wider than the BDL mag.

There are a lot of bottom metal options out there. I’m arbitrarily leaning towards the Hawkins Precision M5 LA CIP for my upcoming PRC build, but maybe LRI will have a CIP-length option done early enough. We’ll see.

As far as magazines go, I like MDT in general, and snagged a couple of their 5rd 300WM 3.850in mags when they were 50% off last Thanksgiving. Alas, haven’t had anything to feed through them yet.
 

jwknutson17

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New to this game. What, if any, mods need to be done to a Rem 700 LA Mag to use 300WM CIP mags and bottom metal? Any one care to provide a link for suitable bottom metal and mags? As I said, I'm new to this and confused as h3ll.
If you have a factory rem 700... The easiest thing I can think of is buying a KRG Bravo stock that fits the 3.850 CIP mags. Cheap, easy, and an upgrade over the factory rem 700 stuff.
 
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2Barrels

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Thanks for the insight . I have a McMillan A5 that I had planned to put to use with the 300PRC that is in the works. It doesn't have a M5 inlet so that would need to be addressed if I used something like the Hawkins M5 CIP bottom metal. Hadn't really thought to look at the Bravo, but it is an alternative.
 

Rocketmandb

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Brass update:

I just got 20 RWS 8x68S cases. Everything looks like this brass will work well. I was able to trim, neck it down easily enough (got neck thickness of .0145 - .0155), and test extraction from my action. It works fine. Next weekend I'll be fire forming 10-20 rounds using some extra 200 ELDs I've got laying around - I'm pretty sure I can get those to jam for forming.

I've never seen RWS before - the brass is very well done and consistent.

I'm confident enough from what I've seen (and read earlier on this thread) that I ordered a custom hydro-forming die (3-4 months out).

P.S. Speaking of brass (cleaning, it more appropriately), I just started using the Bore Tech case cleaner in my ultrasonic. Hands down the best I've ever bought or been able to concoct myself.
 
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gnochi

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Brass update:

I just got 20 RWS 8x68S cases. Everything looks like this brass will work well. I was able to trim, neck it down easily enough (got neck thickness of .0145 - .0155), and test extraction from my action. It works fine. Next weekend I'll be fire forming 10-20 rounds using some extra 200 ELDs I've got laying around - I'm pretty sure I can get those to jam for forming.

I've never seen RWS before - the brass is very well done and consistent.

I'm confident enough from what I've seen (and read earlier on this thread) that I ordered a custom hydro-forming die (3-4 months out).

P.S. Speaking of brass (cleaning, it more appropriately), I just started using the Bore Tech case cleaner in my ultrasonic. Hands down the best I've ever bought or been able to concoct myself.
What action do you have / what extraction style?
 

Ledzep

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Got mine on paper tonight at 100 yards. I tried 77.0, 77.5, and 78.0gr of H1000 behind some 208 ELD's. 1 of the 3 groups (5 rounds each) had 2 holes, the others all piled into 1 hole; 0.25-0.5" groups judging from the scope, I didn't go down and recover them. About 25fps ES and upper single digit SD's with 77.0 and 77.5, and a little worse with 78.0. I have 25 rounds through the barrel at this point so I imagine it will pick up a little speed as things progress, but the 78.0gr load gave an avg. of 2981fps in my 31" barrel. Cases/primers look fine, super easy extraction, and I think there's still room to boost it up if I wanted to.

Up next I'm going to try RL26 and 225's I think. At this point I'm just trying to get 50 fire-formed cases first before I start any serious load development. So far things are looking very promising, though.
 

jwknutson17

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Got mine on paper tonight at 100 yards. I tried 77.0, 77.5, and 78.0gr of H1000 behind some 208 ELD's. 1 of the 3 groups (5 rounds each) had 2 holes, the others all piled into 1 hole; 0.25-0.5" groups judging from the scope, I didn't go down and recover them. About 25fps ES and upper single digit SD's with 77.0 and 77.5, and a little worse with 78.0. I have 25 rounds through the barrel at this point so I imagine it will pick up a little speed as things progress, but the 78.0gr load gave an avg. of 2981fps in my 31" barrel. Cases/primers look fine, super easy extraction, and I think there's still room to boost it up if I wanted to.

Up next I'm going to try RL26 and 225's I think. At this point I'm just trying to get 50 fire-formed cases first before I start any serious load development. So far things are looking very promising, though.
I think you have a lot of room with H1k. Few guys I know run 80+gr of H1k with 215 Berger's over 3k in 26 and 28 inch tubes with no pressure. I have settled in right around 79.0 range. Still playing a little in there. 26 inch tube with 215s at 2950 now the barrel sped up a little. Hit first pressure in one of my guns at 81gr H1k with the 215s. 3050 fps.
I would think with a 31 inch tube and 208s you should be in the 3100 range. I would keep going til you found pressure and back down.
 
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Ledzep

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No doubt. I haven't really pushed the limits with anything yet. The first 10 rounds were 178's over 78gr of H1000. Shot 5, cleaned, shot 5 cleaned, then tested for accuracy today, just kind of playing around with odds and ends. Going to get serious about it in the coming week or two and see what it does with 225's. From published 24" data I'm consistently floating 100-125fps faster, and I suspect as the barrel breaks in that will increase a little.

Running the numbers on JBM it's kind of a wash between the 230 and 250 Atips. Wind is practically identical to beyond 2000yd, elevation is flatter with the 230's, supersonic range is very similar. I think I'm going to develop with and shoot the 225's for now and transfer over to 230's when I can get some.
 
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Ledzep

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RL26 with 225 ELD-M @ 2.680" COAL
31" Bartlein 5r, 1:9.5-1:9 gain twist
Virgin Hornady brass, CCI 250

Rounds 26-50 on a new barrel:

-74.0gr SD 12 ~0.6" 4 shot group (fouler omitted for SD and group)
2860 <---fouler
2884
2881
2900
2910

-74.2gr SD 13 ~0.7" group
2866
2882
2894
2901
2898

-74.4gr SD 8 ~0.4" group
2905
2902
2888
2910
2893

-74.6gr SD 4 one big knot, 0.25"
2910
2914
2919
2913
2921

-74.8gr SD 6 ~0.35" group
2922
2935
2923
2924
2918

Got all of my cases fired, so I'll resize them, bump the shoulder as little as I can manage and test again around 74.4-74.8, then take it out to stretch its legs. Might be a week or three before I get around to it all.
 

Rocketmandb

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-74.8gr SD 6 ~0.35" group
2922
2935
2923
2924
2918

Got all of my cases fired, so I'll resize them, bump the shoulder as little as I can manage and test again around 74.4-74.8, then take it out to stretch its legs. Might be a week or three before I get around to it all.
I'm curious as to why you stopped at 74.8 - though that 74.6 group is sweet...
 

Ledzep

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I had 25 cases left and did 5 rounds each every .2 grains. For whatever reason I also had it in my mind that I was pushing the upper end of published #'s there, but see now that I had some more room to play with. If I had to guess, there's another node somewhere in the mid-upper 75gr range. I'll probably explore that in the future, also. Still just kinda playing around and letting the barrel settle in and getting a feel for things. Now that my cases are all fire formed I'm going to do just a little more testing to verify, then take it live at longer range.

Even at 2915fps Avg, though, if it continues to group and ES/SD stays in that ballpark, I will probably run it. Solidly supersonic to almost 2000yd with 225's, would be over 2000yd with the 230 A-tip. I can leave well enough alone. Another 85fps at the muzzle doesn't add up to much way out there. That being said, I think the barrel will speed up a little over the next 100 rounds, too.

The first 5 rounds nearly copper plated the bore. After cleaning, the next 5 also heavily coppered, though not as bad. The following 15 were better, and these last 25 barely left anything. So things are starting to smooth out a little. I'll see if I can borrow a bore-scope next week and check the throat out.
 
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Rocketmandb

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I had 25 cases left and did 5 rounds each every .2 grains. For whatever reason I also had it in my mind that I was pushing the upper end of published #'s there, but see now that I had some more room to play with. If I had to guess, there's another node somewhere in the mid-upper 75gr range. I'll probably explore that in the future, also. Still just kinda playing around and letting the barrel settle in and getting a feel for things. Now that my cases are all fire formed I'm going to do just a little more testing to verify, then take it live at longer range.

Even at 2915fps Avg, though, if it continues to group and ES/SD stays in that ballpark, I will probably run it. Solidly supersonic to almost 2000yd with 225's, would be over 2000yd with the 230 A-tip. I can leave well enough alone. Another 85fps at the muzzle doesn't add up to much way out there. That being said, I think the barrel will speed up a little over the next 100 rounds, too.

The first 5 rounds nearly copper plated the bore. After cleaning, the next 5 also heavily coppered, though not as bad. The following 15 were better, and these last 25 barely left anything. So things are starting to smooth out a little. I'll see if I can borrow a bore-scope next week and check the throat out.
Brass is always the issue :) - and faster isn't always better. If you can get a repeat performance out of that 74.6 load, then that's a winner.