I have used the black powder substitutes in muzzle loaders and am quite familiar with them and this is not one of them. The substitutes are basically black powder with substitutions of other chemicals for the sulfur.
Hard to clean, somewhat corrosive and quite frankly the lack of a large fragrant cloud is a real bummer compared to the real thing.
I found the black powder substitutes easier to clean then Black powder.
Then one could shoot a savage like I do and use smokeless for a substitute and can go 50 60rounds at least with out the worry of cleaning or that sinky large foul smelling cloud of smoke.