shoulder bump

[mason]

Can to much shoulder bump cause your firing pin to strike your primers off center ???
The reason i ask is i have 10-15 that are off center and the rest are dead center,,just seems a little odd that only a few are off center.
Lapua brass chambered in 30 BR,
Trued up 700 w/the bolt bushed

 

[Travelor]

Only if the cartridge bodies have been sized to the point they are way undersize and as sloppy in the chamber.

Put a case in the changer and see if you can see it wobble around wiht the gun pointing down and the bolt out.

Just how off center wer they?

 

[mason]

.015-.020 off center.