Once you go black, you'll never go back!
Substitutes are just that. A substitute. Not the real thing.
I shot Holy Black in my Knight Disc after I tried Pyrodex, 777, and Blackhorn 209. None of them could equal the accuracy I got with BP.
Ed
LOL, I may draw some heat from this Ed but, a syn stocked, camo, stainless barreled scoped inline is not a real muzzle loader to me, therefor 777 or BH-209 is ok with me on these JCL rifles.
Real Black for me is reserved for flinters, side lock percussion and Sharps rifles.