Yes Dai there is technically a legal problem with black powder. The bombing of the World Trade Center in NYC seems to be the beginning of all sorts of silly, unenforcable new laws. I have seen a copy of some of the regulations provided one of the local reenactment units by a fellow who makes his living professionally as an explosives expert and pyrotechnician. It seems that blackpowder enthusiasts are limited as to how much powder they may transport. That quantity is measured in ounces. Whenever I load our units' cannon (a 3/4 scale replica of a 6 pound James, could pass for a full scale mountain howitzer) on my truck and take it to an event, I carry about ten pounds with me. I guess theoretically I am in violation of federal law, although no one has yet challenged me or questioned the practice. The fellow that provided the material on powder regulations was unable to tell us if we fell into a seperate group and had a differing set of regulations to govern us or not. It is all very confusing, hearing different things from various different sources. I suppose until something adverse happens to draw attention to our hobby, ie:a mishap in the handling of black powder, we will be allowed to carry on business as usual.