I don't care for substitute black powder, or is it synthetic black powder. I had a can of it back in the 80s and wasn’t impressed. If you like the way is shoots use it, I believe modern muzzle loaders are designed around it so they may work better with it but I wouldn’t know. I don’t even mind all the editorializing coughing and hacking that goes on around me when I’m at the range with the old .54 Renegade.