I have heard that you are not supposed to use anything petroleum based with BP, but I have also heard that's just a myth. If I used something like simple lube (recipe below for convenience), am I going to have issues with a black powder cartridge rifle, or should it work just fine? I'd rather not have to have two different types of lube in stock if I can get away with just one.
Simple lube.
4 oz's beeswax [by weight solid]
4 teaspoons of white petrolatum [vaseline]
2 teaspoons of two stroke oil
2 teaspoons of atf