I have one from the 60's in a half stock that has been converted to percussion along the way.It is neither fish nor fowl for caliber- it is smooth bored at 7 gauge and just a few thousands tight for a true 7 gauge. The previous owner used it for black powder trap at Batesville, Indiana but I have not fired it myself.The conversion work is rather crude but solid-lock bedded in with steel bed and the bore is in good shape.I may try it with shot myself to see what it does.