577-450 Bertram brass, Winchester large rifle primers, 65 grains by weight of Triple 7 FFG, a filler mix of 5 grains of Triple 7ffg and Cream of Wheat on top of the main charge for an equivelent load of 90 grains of FFg black powder. Two discs of waxed paper as a lube barrier .460/460 grain Coyoté hollow base bullet, and plenty of crimp.
Oops, muzzle loaders huh. Triple 7 had to have been made just for cartridges.