I read over the weekend where an MZ "expert" claimed that most BP rifles perform more accuratley on a slightly fouled barrel. His suggested technique was to shoot, lick one side of a cotton patch, swab the barrel with the damp side, flip the patch, swab the barrel with the dry side, reload and shoot again. He also suggested never hunting with a "clean" barrel. His point was a clean barrel is frequently 6 inches off-target at 100 yds. and rarely in the same direction. Any thoughts on this?