GOEX makes black powder, and sells "Pinnacle", a BP substitute made by American Pioneer, which also sells their own stuff. Both of these types of powder are similar, and cleaner than T7. I have heard that Black Mag3 is excellent, and will try some as soon as I can find it locally.

Another excellent (probably the best BP in the world) powder is Swiss Black Powder, a true BP with all the smoke & smell you need to sniffto become a truly addicted ML guy, but cleaning is a little moe difficult when you use a true black powder. Swiss is a "sporting rifle" powder, very powerful and accurate, and a trifle cleaner burning than GOEX.

And, contrary to what a lot of people say, Pyrodex is quite acceptable. I can shoot all afternoon with Pyrodex and not have to wipe the bore between shots, as MOST of the solids resulting from Pyrodex combustion are blown out of the barrel, whereas when using BP, most crap deposits itself on the inside surface of your gun's bore....

American Pioneer and Pinnacle are both quite clean, and cleaning your rifle after a days shooting is a snap with either of these powders.

ALL ML MUST be cleaned well on the same day you fire them, and both BP and Pyrodex require a lot more work to get all the fouling out of the bore and off of the external steel parts, which is absolutely mandatory to prevent rust.

I believe you will be pleased with a White!!