I don't shoot black powder so I can't comment on that use but I like it because it can be used on every part of a gun/accessory, metal, wood, plastic, leather and will not hurt, but in fact benefit the part in question. Also, it is not toxic and as you mentioned in a funny way, it is about as "universal" as a product can get. Cleans, lubricates and protects..............without all the harsh/dangerous chemicals