Originally Posted by
Cosmic_Charlie
Twice I have broken in the bores on new bolt action rifles. Shoot one shot, clean the bore. Shoot two shots, clean the bore. Carry on until you shoot ten shots. Used JB bore paste. Could actually feel the bore get smoother as you pushed the patches through. Both these Remingtons could do 3 shots inside an inch at 200 yards with hand loads. With a 7mm mag it would be expensive and a work out! Probably better to just clean after each outing with it and then work the bore with back and forth strokes of JB.