Tritt007
I have used pyrodex p in my cap lock Kentucky long rifle. I started at 50 grains by volume then worked up till I got good group and the CRACK that a muzzle rifle is suppose to have. The CRACK is the optimum powder for each rifle, my was at 82 grains, my neighbor rifle was 78 grains, same rifle, same bullet, round ball, same nipple hot shot and same cap. It is best to start low and work up, for each rifle, because each rifle is different.
Smokeploe