Irv Joffe had one of those big bore cannons on the wall in his shop in Upper Darby, Pa. It was a percussion gun and looked like it would punish on both ends. That was back when you could buy a Lee Enfield for 14 bucks and a Jungle Carbine for 25. I bought a couple of trapdoor Springfield 45/70s there real cheap too. (as well as a lot of other stuff)