I was driving near Clare,Michigan recently and stopped in a very large gun/sporting goods store there because I thought for sure a store that size would carry black powder. First of all, I was astonished by the lack of knowledge of salespeople at the gun counter who sent me to the smokeless powder dept even though I specifically asked for BLACK POWDER, but that's another story and possible thread. When I finally found the "correct" section, I found a good variety of containers marked with FFG and FFFG, and some of them were good brand names, ie Hodgdon. I thought I had found what I was looking for until I started reading the fine print on the cans, where I saw phrases such as "non-corrosive", "contains no sulfur" "and "advanced technology substitute". The Hodgdon cans also read "can be used in flintlocks"! As soon as I saw "contains no sulfur", I balked....no sulfur? Not black powder! All of them were labeled "Explosive". I have a couple questions for forum members.Is this a NEW type of black powder substitute? I mean, beyond Pyrodex and some of the other stuff? Has anybody used something like this in a flintlock? Does it work? I really am just curious, because I am sticking to black powder if at all possible, and I don't intend to purchase this stuff. When I really pressed the store personnel, they finally told me that they don't carry real black powder because it has to be kept in a safe, records kept, etc. What say ye?