My .54 Lyman Trade Rifle flintlock for some reason shoots a 250 grain XTP real well out of a sabot. I was shooting it one day and found a couple packs of them hanging on my bullet board. And so I tried them with 80 grains of Goex 2f. The results were exceptional to say the least. Good luck, keep us posted, and I hope you miss the snow that his the twin cities.