WHY????? The pre M14 K38 Masterpiece is a hand made tool for match and target shooting. If you want more power I would suggest you buy a M19 or M66 or one of the L frame revolvers and shoot magnums. I have 5 pre M14's and one M14 and the hottest loads I shoot out of them and my pre 10's is the 158 gr. Police rounds. Round nose and wad cutters.My opinion. Big Larry