Primer seating 375.

[chamberbrake]

I have Peterson 375 Chey brass and after 1 firing and completely clean primer pocket I get a shallow seating. This happens about every 40 rounds give or take. Primer sets just past brass bottom but is noticeable when you set it on a level surface upright. It causes changes in my ES/SD which is to be expected. Any thoughts on this? No matter how clean I get primer pocket, primer bottoms out but not when brass new.

Federal 215m's. RCBS hand primer tool. .
Thanks,
Aaron

Socials
- chamberbrake.com
- facebook.com/chamberbrake/
- youtube.com/c/chamberbrake
- instagram.com/chamberbrake/

 

[MACHTECH]

Hi Aaron, Good to see you on here! I can't explain why it happens, but I had the same issue when I used the Sinclair hand priming tool. I always thought people were crazy for spending this kind of money for a priming tool until I got one. Every one comes out the same now. If you can find one of the older CPS lites, they are a lot cheaper but work pretty much the same way.

CPS - Competition Primer Seater

Todd

 

[chamberbrake]

Hi Aaron, Good to see you on here! I can't explain why it happens, but I had the same issue when I used the Sinclair hand priming tool. I always thought people were crazy for spending this kind of money for a priming tool until I got one. Every one comes out the same now. If you can find one of the older CPS lites, they are a lot cheaper but work pretty much the same way.

CPS - Competition Primer Seater

Todd

Wow so your right on cost. But I'm intrigued so going to look into it further! Lol