I have been shooting a lot of Hodgdon Triple Seven (3F) in a 36 cal Remington. I like it because it gives me velocities in the 700s with around 10grains. I also shoot it because it is the only muzzleloading powder I can get. My thinking was that since I was using less powder than would be required if using true BP, I would get less fouling. On the container is the statement "Does Not Contain Sulfur". This got me wondering: "How do they make BP substitutes? It looks like BP, is charcoal used? There are a number of BP substitues, are they all basically the same?