aaron - first off you did not mention what kind of rifle you intend to shoot the BlackHorn off in. Be sure your rifle is set up to handle the powder before you go all out looking for it. Some of the other sub powders will work just fine for you under the same circumstances.

But if you do need to clean it. Montana X-treme cowboy solvent will take it right out of the barrel. And then some Bore Conditioner will protect your rifle. Other good solvents are Hoppes, Birchwood Casey Bore Scrubber, and some like that will also take the Black Horn out of the barrel.