Dave;

The 300 grain XTP .452 in a MMP short black shoot under 2" @ 100 yards from my 28" GM 1/28 flint barrel. I use 100 grains of Goex 3f. The .452 250 grainers shoot pretty sweet too but the 300 is a little more accurate. I have only shot one deer with the 300 grainer and it was quarter facing; shot thru the front of the left chest/shoulder and out under the offside leg; the deer dropped staight down at the shot and never moved after that. Distance was 65 yards.