Stop in for a cup of coffee

You are right under the Gun Control Act a black powder weapon is not consider a firearm. A convicted felon can possess one but cannot use it for any illegal activity. Shooting someone in the head...illegal.
I built a .45 cap & ball derringer long ago. Took it on my camping trip during deer season to Colorado just to try it out. I swear you could almost see the bullet heading for the offending target tree :lol: I had my buddy fire it and I did hear the ball whiz by on the way to the tree after the big bang and cloud of smoke :rofl: