...of the firing pin hole. This is a bolt out of a high quality action. It is straight and true and close to perfection in manufacture. I won't tell you who made it, even if you guess, since it is irrelevant and it could be interpreted that I am posting negatively about the maker. A lot of quality makers, in fact, just about all of them, use a larger firing pin hole that i think is appropriate. The good news is tomorrow this one will have a .060" diameter firing pin hole and will be headed home. I'll post the diameter of the gauge pin in the firing pin hole tomorrow night.