you might want to try .45 caliber 300 grain Hornady XTP or SST that are .452 diam and put them in the black Harvester High Pressure sabots. The XTP are hollow point and the SST are pointed poly tip. They are reasonable in price, you can get them at Wal Mart and on top of a 100 grains of Pyrodex you might be surprised. Start them out with 80 grains and work your way up. Off a good rest you might get a real tight group. Hope the gun works out good. Shockwaves and Cheapshots also shoot good.