Biff,I haven't experenced any leading in the bore,I think it's because of the sabots. I shoot T/C Cheap shots as well,and no leading with them either. I shot one into a deer carcass,and the exit hole was about three times the orginal diamenter,but couldn't recover the bullet,it passed through,and into a clay bank. I don't know the hardness of the bullets,but they are made of pure lead. I thought that it would work better if it was cast harder,but a friend of mine is a very experenced bullet maker,and said the pure lead would "upset" or expand and actually fit the bore/with the sabot better. Ron