I am the fan of killer firing pins, I want my firing pins to crush the primer before the case, powder and bullet know their little buddy, the primer, has been struck. I do not choose to apply the .7854 rule, it is a rule I am stuck with.
Again, I was asked: "What is wrong with R-P ammo?". I had to reply with "CALL R-P! There phone number is on the box". Long story, everything but the box and shooter contact information shows up here. 5 failed to fire and 15 cases that did fire. The 5 fail to fire and the 15 that fired. The 5 that failed to fire were hit with firing pins at least 5 times from 4 different rifles.
I removed the bullets, I removed the powder, I removed the primers, magnificent ammo. I then seated the primers without bullets and with out powder, I will tell you that lightened-up the ammo, but still, when I chambered the primed only cases in one of my rifles with a killer firing pin they all fired. AND!
none of the primers protruded from the case head. I could say "that is the other White meat".
The disciplined reloader that brought the ammo from the range went home and started doing a search for tools like the ones we used.
F. Guffey