For the .300wm it was tested at a spec. of 3.450" avg. O.A.L. if memory serves me correctly.
I've got test data on Saami min. spec. chambers and the A191. They are pretty close over all. The A191 helped a little with pressure on a new barrel if the ammo was loaded to max. spec. length. The A191 helped as the throat is a tad longer than Saami min. spec. but it didn't change a ton.
For a reference....at a velocity of 2850-2900fps. with a 220gr. bullet the pressure on average will be around 72k psi. give or take a little with type of powder, bullet and chamber being used, rounds on barrel, how being cleaned etc....
Here is a little more food for thought....I've seen instances where a .0001" tighter throat diameter with a bullet at the max. tolerance diameter drive up pressures 4k-6k psi. You wouldn't think a .0001" would make a difference but it can.
Also seen examples where a barrel was made with a bore and groove .0005" under min. spec. and it drove up pressures 8k-10k psi.
A close number based on ammo run in a pressure test barrel and 2950fps....your in the mid 75k-80k range for pressures and that was in pressure test barrels with the A191 chamber in it as well.
Normal max. Working pressure for .300wm is about 65k psi.
Is this your load Frank?76.5gr. of H1000 with a 220gr. puts you in the 72k psi range.
Is this your load Frank?
I guess I am confused. You made a statement of fact in this comment and then later say you 1) have never messed with a 215 Berger and 2)your COAL tested was 3.45". The 215 has a very short bearing surface and most of us run it closer to 3.7". I think we all know when we actually start seeing pressure signs we are actually over pressure. 99% of us have no way to check for pressure other than brass and extraction.
We can get this thread back on track. I know what chamber I have and I know where my 215s touch.
Frank are you running H1000 in the PRC?
My statement really had nothing to do with me it had to do with you saying he was at 80k yet you have never tested 215 Bergers seated out where most are seating. Again I am not saying most guys are not running over pressure I was just confused by you making a statement of fact based off different bullets in different chambers. In my current chamber 215s touch at 3.680"
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Yes, That is what I said pages back.Your print is a standard Saami min. spec. chamber. Not the A191 chamber.
That question was for frank. If you are going to say what primers you used you should also state the powder and bullets. Frank had already stated the other information in the thread.Yes, I have tried 215M, 210 match, cci 250 and cci 200. The cci 200 gave me the best ES and SD plus smaller groups. The cci 200 cut my ES and SD in half. The cci 200s were about 12 FPS slower then the cci 250 and about the same for the 215m. I’m not saying they won’t work for you, but you need to test what your gun likes. The cci 200s also did just fine in teen degree weather.
That question was for frank. If you are going to say what primers you used you should also state the powder and bullets. Frank had already stated the other information in the thread.
I'm due for a new barrel on my Ultra Mag 26" considering the 300 PRC but dont want to give up much velocity. Currently running 215 and RL33 3100 FPS