I had one of my 13 yr old 's shooting the .50 Deerstalker Flintlock, using 50 gr 3f Goex and a 495 ball and he shot the heck out of the bull at 25 yds. It was a two inch bull and there was nothing left of it. He compared that load to a .22 recoil wise so to bump it up to 70 would not be too much of a stretch or hard on the shoulder for hunting.