Just got one myself, 200gr. hornady sst with 110 gr. triple 7 shot 3/4 in. group at 100 yd. up powder charge to 120 gr. triple 7 opened up group to 1 1/4 in. also tried precision rifle 240 gr sabots with groups in the 2 1/2 in. range, but the sabots were flying apart, with a different sabot they may tighten up. if you want to try a heavier bullet the power belts in 275 grain with 2 pyrodex pellets shoot around 1 1/2 in. groups out of mine. If you load them much hotter the plastic on back of bullet will blow apart and will not shoot very accurate. To get these groups I had to run a spit patch between shots and the first shot out of a clean barrel is always off a little.