300 PRC

[Jscb1b]

This is 75.5gn H1000. There is no heavy bolt lift.

 

[Jscb1b]

I'm going to go up to 76gn in .1gn incerments.

 

[375fan]

I'm going to go up to 76gn in .1gn incerments.

I don't know anything about the AW2 chamber you mention. My 300prc is the standard chamber. FWIW , I use N565 in my with 230 A-TIPs. In initial testing I did try using with the 230 A-tip and was up to 79gr of H1000 with no issue. Never tried that 230otm your using.

 

[Jscb1b]

If you get "clickers" when opening your bolt, the sammi chamber is too tight. The Alex Wheeler 2 "AW2" reamer opens the back of your chamber a couple of thousands of an inch. This is to give more clearance for extraction.

 

[375fan]

If you get "clickers" when opening your bolt, the sammi chamber is too tight. The Alex Wheeler 2 "AW2" reamer opens the back of your chamber a couple of thousands of an inch. This is to give more clearance for extraction.

Thank you for the explanation.

 

[Jscb1b]

Thank you for the explanation.

Google Alex Wheeler. He has a gunsmith shop. He has good videos out. It is really worth the time to check him out.

 

[Kino]

Did a velocity ladder test today, 75.6, 75.8, 76 and 76.2 was all within FPS!!!!! The second charge was 5fps slower, the other 3 charges was exactly the same speed! Ran the test all the way to 77.6gr and only then ran into a very faint ejector mark, primer still looked fine and bolt opened like everything else.

Zero pressure signs, touching the lands so I'm going to run 76gr and never look back!

 

[Mike Tackleberry]

One of my favorite loads as of now.
Berger 245 LRHT
VV N568 82.5 GR
Lapua Brass with CCI 250
CBTO 3.026 JAM + .020
COAL 3.890
2860 FPS

 

[LongRangeAggie]

One of my favorite loads as of now.
Berger 245 LRHT
VV N568 82.5 GR
Lapua Brass with CCI 250
CBTO 3.026 JAM + .020
COAL 3.890
2860 FPS

Are you single loading these or do you have a Wyatt's box mag?

 

[Mike Tackleberry]

Are you single loading these or do you have a Wyatt's box mag?

Single Feed

 

[Flyperk]

Anyone loading Hornady 212?
I was using V550, 80gr, on a 26” DT barrel and pushing 3025 - 3050. Started seeing just the slightest primer flatting. Groups were .7 but recoil was pretty stiff.

 

[Schw15]

One of my favorite loads as of now.
Berger 245 LRHT
VV N568 82.5 GR
Lapua Brass with CCI 250
CBTO 3.026 JAM + .020
COAL 3.890
2860 FPS

How long of barrel?

 

[XP1K]

What about a 10 twist if a guy was going to stay with the 212-215 bullets ? I've got an old shilen that was pulled off my winmag with 180ish rounds on it. Thought about trying a prc in it after my current winmag is done.

 

[Taylorbok]

What about a 10 twist if a guy was going to stay with the 212-215 bullets ? I've got an old shilen that was pulled off my winmag with 180ish rounds on it. Thought about trying a prc in it after my current winmag is done.

You aren't taking full advantage of the cartridge with those bullets but other than that go hard.

 

[EUBANKS]

I don't know anything about the AW2 chamber you mention. My 300prc is the standard chamber. FWIW , I use N565 in my with 230 A-TIPs. In initial testing I did try using with the 230 A-tip and was up to 79gr of H1000 with no issue. Never tried that 230otm your using.

Im a big fan of that combo! I found that 76.9 grains of N565 or H1000 works great with the 230 ATIP projectiles in a 1 in 8 twist barrel for a MK22.

 

[EUBANKS]

What about a 10 twist if a guy was going to stay with the 212-215 bullets ? I've got an old shilen that was pulled off my winmag with 180ish rounds on it. Thought about trying a prc in it after my current winmag is done.

Id try the 220 grain Berger Long Range Hybrid targets!!!

 

[EUBANKS]

One of my favorite loads as of now.
Berger 245 LRHT
VV N568 82.5 GR
Lapua Brass with CCI 250
CBTO 3.026 JAM + .020
COAL 3.890
2860 FPS

what twist barrel?

 

[category_theory]

Haven’t shot in a long while but damn did I forgot how I missed reloading these beauties!

 

[FrozenMinnesotan]

Anyone try 210gr smk with rl26? Sierra doesn't list rl26 for it. I have h1000 and rl26 so far.

 

[max1840]

I have not shot less than 225 grain bullets but Hornady’s app shows loadings for their 200 grain and 212 grain bullets with RL26. I’m sure you could come up with a good safe starting load and work up from there.

 

[EUBANKS]

I'm developing a load for a new 300 PRC barrel. so far I have tried:

1. H1000 with Berger 220 LRHT
2. N565 with Berger 220 LRHT
3. N565 with Berger 215 HT
4. N570 with Berger 245gr LRHT

- 3 has the smallest groups but very high ES/SDs
- 4 has endless vertical strings
- 1 groups well but has higher ES/SD than 2
- 2 has the lowest ES/SD but does not group as well as 1

I'm continuing with 1 & 2, trying with different primes now.

Im having almost exactly the same results with these combos.

 

[FrozenMinnesotan]

Doing a ladder test with 208gr eldm and 210smk with h1000 from my bergara hmr. This was from a ladder test from 76.5-78.6gr 210smk at 100yards. .49" shot as pictured

 

[Dirt Nap]

New rifle put together for my elk hunt last year. Have about 100rds down and the barrel has started to speed up. Had about a month to get everything dialed in. Hammer hunters did the job. 485yds, total dirtnap

24” 1:9
ADG Brass
Hammer Hunter 199gr
H1000 80gr
3.625 COAL
ZCO 4-20

 

[txbass97]

does anyone have a Berger Load manual - looking for a screenshot of the 230gr Berger Hybrid load data

 

[nick338]

Right at 100 rds with this rifle. Defiance Ruckus, Bartlein 8.5 twist finished at 24"

5 shot zero at 100 and all other groups out to 300 are right at .4 MOA with the current load.

81.5 grs N570
245 Berger LRHT
CCI 250
.020 off
2825 FPS

Retumbo is also showing some promise around 2770 FPS but I need to test at longer range.

 

[Mike Tackleberry]

what twist barrel?

9T

 

[Overton-AR]

I am just jumping into the 300PRC. My build is a CRB barrel (chambered by Preece Precision) mounted in a Lone Peak Fuzion long action. Chassis is an MDT Elite. I bought 100 Peterson brass, 300 of the 245 LRHT and a keg of N570.

I am excited to get into this caliber.

 

[Overton-AR]

Today I Purchased my latest suppressor that will go on the 300PRC once the build is done.

Thunderbeast Magnus S-RR-SR

 

[HemiPowrd]

Today I Purchased my latest suppressor that will go on the 300PRC once the build is done.

Thunderbeast Magnus S-RR-SR

Same suppressor I use. You will love it!

 

[padom]

I finally got my 300 PRC together today. First barrel is an Osprey from PVA. I also have a Mullerworks HV 1-9 coming from Manzella.

300 PRC
30" PVA Osprey 1-9 1.2" Straight
Muzzle Thread 3/4-24
Zermatt TL3 LA
XLR Envy Pro C6 w/weights and NV Bridge
Bix TacSport Pro 2 Stage
Vortex Razor Gen3 6-36
Area419 Rings

Waiting for my Rugged 3 Port QD brake to arrive. Will get out next week to test these out.

I ran my 21st Century 30cal Turning mandrel through 50pc of new ADG 300 PRC brass, chamfer/debur and primed with 215's.

Loaded up 10rd each H1000 under 215 Berger

77.5
78.0
78.5
79.0
79.5

 

[Schw15]

Im working up loads for my dad 300 prc berger 245 loaded around 3.750 n568 79.3 grains with drop tube. Shot 80 grains felt like it was getting hot..... but tested 79 with great results now came back 79 78 and some 77 grains open stiffer and click..... I have the shortaction dies. I took measurements and dont see anything concerning. Maybe chamber is tight or what do you 300 prc guys think

 

[padom]

Just got back from shooting this 30" PVA Osprey 1-9 300PRC for the first time

I shot 5 foulers I loaded to get a rough zero at 100yd...

I then shot these 2 five shot groups with my first 2 charge weights at 100yd... not bad for my first time loading or shooting the 300 PRC..

I then shot the 5rds of the next charge weight.. 78.5gr that meadurd 0.930" @ 200yd and stopped there. I was starting to get light ejector marks on the case head. I didnt shoot thr 79.0 and 79.5gr I had loaded. Ill pull them

 

[padom]

Next ill do a more granular load test 77.4-78 2gr in 0.2gr increments then do a seating depth test. Then ill shoot my final load a distance

 

[Schw15]

Next ill do a more granular load test 77.4-78 2gr in 0.2gr increments then do a seating depth test. Then ill shoot my final load a distance

After seeing your loads I might be a touch hot then

 

[375fan]

Just got back from shooting this 30" PVA Osprey 1-9 300PRC for the first time

I shot 5 foulers I loaded to get a rough zero at 100yd...

I then shot these 2 five shot groups with my first 2 charge weights at 100yd... not bad for my first time loading or shooting the 300 PRC..

I then shot the 5rds of the next charge weight.. 78.5gr that meadurd 0.930" @ 200yd and stopped there. I was starting to get light ejector marks on the case head. I didnt shoot thr 79.0 and 79.5gr I had loaded. Ill pull them

Going to throw in my .02 fwiw based on my experience with the 300prc and other .30cals.
With what I'm seeing and reading in your post this is a new barrel, I wouldn't spend a bunch of time and components till barrel is broke in, say 100-150 rounds down tube.
.2 increments are a waste imo when using that much H1000 or a lot of other powder. I use .3-.4 increments for testing in the range you're using for charge weights in loads.
If I were you, I'd load up 50 of that 77.5 load ,zero and shoot at distance. See how it truly performs and break barrel in at same time, keeping track of velocity along the way.

 

[padom]

Going to throw in my .02 fwiw based on my experience with the 300prc and other .30cals.
With what I'm seeing and reading in your post this is a new barrel, I wouldn't spend a bunch of time and components till barrel is broke in, say 100-150 rounds down tube.
.2 increments are a waste imo when using that much H1000 or a lot of other powder. I use .3-.4 increments for testing in the range you're using for charge weights in loads.
If I were you, I'd load up 50 of that 77.5 load ,zero and shoot at distance. See how it truly performs and break barrel in at same time, keeping track of velocity along the way.

I dont do sny load development until I have 100pc of fireformed brass with any new rifle. I have to pull these 20rds and reload them along with the other 50. Once I have all 100pc of 1x fired ill proceed with my testing noted above.

 

[Overton-AR]

Just got notified yesterday that my Preece built 300PRC will be arriving at my local FFL on Monday. It’s a 26” CRB barrel in a Lone Peak Fuzion action. My suppressor also made its way through the ATF government shutdown (form3) and arrived in at my local FFL today. Will file form 4 later today and hope to have the suppressor in hand by the end of next week.

The ZCO 5-27 scope should be here by middle of next week. Man this is gonna be fun.