Quote Originally Posted by Robinhood View Post
I don't like the fact that the one bolt with ejection issues has a .473 bolt face counter-bore that measures .490.
0.490" seems to be about the norm for factory .473" bolt heads these days.


Quote Originally Posted by culpeper View Post
What is a counter bore?
The counter bore he is referring to is the round recessed area of the bolt head where your case head fits into.