Originally Posted by
Nor Cal Mikie
Beating a dead horse again BUT, ever consider the brass (on factory ammo) being too short for the chamber? Not a head space problem it's an ammo problem.
When the trigger gets pulled, the case gets pushed forward in the chamber by the firing pin, primer goes POP, rounds goes off and case gets pushed back onto the firing pin. Primer tries to move back out of the pocket, gets pushed back into the pocket and craters.
New bolt head, new contoured firing pin and you've STILL got the same problem? Hmmm. Keep throwing $$$ at it.
Keep at it till you find the right ammo OR learn to roll your own.
Like Charlie says "I'd stop worrying about it and shoot more".:cool: