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?

 

[EUBANKS]

Hey everyone, I have an awesome load worked up for my 300prc, but its with H1000. I'm thinking of changing powder since I only have 2.5lbs of H1000 left. Main reason is, it seems to be easier to get Vihtavuori here in Canada, also its cheaper as well with H1000 at $100/ lb now. I started stock piling N570 for my 338 edge, other forums show great success with N570 in 300prc. N570, if I remember right is $160/ 2.2lbs.

Has anyone else found N570 a good powder for 300prc with 225gr eldm, or similar bullets? What main Vihtavuori powders are you guys using for 300prc?

Im getting good results with N565. Using 76.9 grains (4983 MG) and getting 2870 avg speed and an SD of 6 on 30 round groups. Using Federal gold medal match primers. I have attached a spreadsheet with actual measurements, seating force, speed, etc.