Thanks for the hints, got one of them adapter kits. It has what looks likr a .308 win catridge where you fit a .22 hilti blank and then push a lead ball in and the ones in the kit are definatly .308. out to 30 yards you can shoot into the same hole all day. On a moose or deer hunt chickens and rabbit all day, it is very quiet too. I will try some 0 buck and see if it will work.