Hey Raynor,
I use Pyrodex P in both my Huntsman and my White. In the Huntsman, I use 100 grains and Hornady XTP 250 gr JHP. When I sighted in a new scope I put on my Huntsman, put 5 shoots inside of 1 and 1/2 inches at 50 yds and not off a good rest. Very happy with Pyrodex, maybe a little more dirty than 777.