I was looking closely at my Carcano bolt, and the only line of defense in the case of a blown primer is a gas escape hole and a very small lug on the side of the safety. Am I missing something or is this considered enough? The bolt itself has 2 lugs and the bolt handle acts as a lug also, so I am not worried about the entire bolt.But if that little lug failed, it would seem that the firing pin assembly could be shot backwards.