Off-Centre Firing Pin's Effect On Accuracy
Q: I noticed that the firing pin indentation on the primers of cases fired in my Savage .22-250 are not perfectly centred. Why is this? Does it have any effect upon accuracy?
A: The firing pins of most rifles strike the primer of a cartridge slightly off-centre. This is due to the fact that when making rifles on a mass-production basis, it is virtually impossible to end up with the receiver, barrel, chamber, bolt and firing pin tunnel all in perfect alignment. The misalignment has no effect on accuracy so long as it is not extreme.