What part of Tennessee are you looking? Not too terribly long ago Teds on the square in Columbia had some as did Steve's out on bear creek. Can't remember when, but it was after powder became hard to find. Good luck with it.It's definitely possible, but I did clean them pretty well before I shot. I cleaned them again yesterday, and I know they are spotless this time. I'll try them again and see if I still have an issue.
Thanks! I'll probably end up having to order real BP online and paying hazmat. All of the places around here that even stock black powder stuff, don't have actual black powder, a handful of them only have pellets.