Mr. Henry Anvil, im not sure if you are into subs...but i hate pyrodex, cant stand the expense of 777, pellets degrade fast and you cant really fine tune a load using them, but i do have high praise and nothing but positive things to say about a sub called Alliant BlackMZ. It burns hot, extremely clean, perfect for .50+ cal muzzle loaders, and is very inexpensive if you get it from sportsmans warehouse either at their physical store or online store at only $10 a can and even with hazmat shipping fee its a great price. I makw my own black powder, but if i do buy any its Old Eynsford, if i shoot a sub its BlackMZ.