Q: Does shooting shot loads in a .22 rifle or centerfire revolver damage the rifling, cylinder, or forcing cone, thus hurting accuracy with standard ammo?
—Steve Duncan, Marion, N.C.
A: Shooting shot in a .22 rifle should not hurt the gun—or much of anything else. I am, however, uneasy about shooting it in a handgun, which may prove difficult to get truly clean afterward. That said, in .45/.410 it seems to work O.K. You can use it, but I'd give the parts you mention a good scrubbing soon after.