I like 777 better than pyrodex for several reasons. Clean up is easier, much less corrosive fouling, 777 doesn't go whacky after a couple of months of opening the jar like pyrodex does.
777 can't be compressed when loaded in cartridges, but Hornady's load information says nothing about compression in a BP rifle, shotgun, or pistol.
How about a Non-Sulphur propellant ? ....What results can I expect out of my T/C 50 cal. Hawken and non-black powder propellant?