Thread: Lapping barrels

Probably used the wrong term , i have a rem factory barrel that has some rough spots about an inch from the muzzle end and im wondering if they are causing the groups to be a bit bigger than you might get if they were not there 2inch at a hundred. That said it is a mountain rifle contour so i dont shoot more than 3 shots at one go as she heats up and starts biffing them around . I am using hornady 150 eldx factory ammo at the moment ,i have not started to hand load yet . I removed all the copper from it but have yet to return to the range to see if that was the main problem .