I picked up a 300 win mag built on a 98 mauser action.it turned out to be a tack driver, but when i went to reload i found the rounds would not go back in.i figuired out the boltface had not been squared up when it was opened up to take the 300 ammo.i took to a gunsmith close by and he fixed the bolt for me.i started having some more problems after that.that gunsmith had closed up.so my question is this.could squaring the bolt face up have caused a headspace problem?