I'm getting back into Flintlock smooth bore or rifle shooting. I was looking who still sold real black powder near me in North East, Maryland, No one , then i looked at the cost of it, Man it is expencive to have it shipped from BPS who has it and it ain't cheap.Do any forum members know some place even 60 miles from me. I live close to the Delaware and Pa boarder.I'd rather pick it up myself. I can't use the substitute powder in a flint lock, Right ?