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Difference in primers?

Posted: Tue Nov 10, 2015 9:53 am
by procrastinator43
Reloading 32-20 rifle.

What will the difference be between Winchester small rifle primers vs small pistol primers?

Re: Difference in primers?

Posted: Tue Nov 10, 2015 10:58 am
by Beck77
They are the same size but the rifle primer will usually be harder and often contain more of the priming compound since there is usually more powder in a rifle cartridge. Many competitive pistol shooters use SRP in place of SPP for certain powder combinations. Some factory pistol loads like the 454 Casull use SRP instead of SPP because of the powder volume. I don't know in your 32-20 if you would see a huge difference, I wouldn't load a bunch with SPP without verifying they work OK.

LRP and LPP are the same diameter but the LRP is deeper.

http://www.chuckhawks.com/primers.htm

Re: Difference in primers?

Posted: Tue Nov 10, 2015 11:41 am
by Wulfmann
There can actually a bigger difference in brands of the same size primer than the SP or SR of the same brand.

Check burn rates as it is amazing the variances.

Then some SR makers vary the thickness as in Wolf SR & SRM (same solution but thicker cup) and SRM223 has a hotter solution as well as the thicker cup

I have shot many types of SP in AR15s as a test and never could tell any difference and I have used SR and SRM in 9MM loads and testing next to SP primers all else the same could not detect the slightest difference

The biggest difference is accuracy for match loads, IMO. There a different brand can alter group sizes considerably

/:f

Re: Difference in primers?

Posted: Tue Nov 10, 2015 2:40 pm
by procrastinator43
Thank you for the responses.

When I get some lead bullets from Buffalo Arms, I will do some testing.