Oh, forgot that part.
A lot of the lube used is NOT compatible with black powder and will combine with the fouling to produce a sticky tar like mess that does not clean away easily. You want a BP specific lube or you want to use bullets that are known to at least not turn the fouling into tar.
The folks that run Bullet Barn used to shoot a lot of black powder cartridges in their cowboy action shooting. As a result Andy, one of the two that run the outfit, uses a lube which is at least black powder tolerant. Outside of that I don't know of anyone selling bullets that are specifically BP friendly.
If you want to use something you have already you can make your own BP lube. To clean out the existing bullet lube just drop the bullets into boiling water and the wax will come out pretty quickly. Then you can pan lube the bare bullets with some BP lube. You tube is full of videos on how to pan lube cast bullets so I won't go further down that road.
