Originally Posted by RobF
Normally to cure shift caused by the barrel being pulled around by the stock. It's unlikely you'll hold the same zero taking the action in and out. Possible effects of temp shift on it. Doesn't seem to harm accuracy.
In the case of the walther , at least the ex team gun that i watched a mate buy bought some years back at a GP . the barrel was slightly out of line ( up ) and i watched him bend it back in line . this was not the barrel bending it was the receiver . bit extreme i know but it happened . ???