I'm building one a tad bigger. It's about 20 inches long and has a 1.125 bore. I'm figuring out how to mount the trunions. I had to make a steady rest to thread the breach and to build the steady, I had to make a tool post grinder.
Loooong project! The breach plug is welded after screwed together. One half of the caskabell is turned but the rest is a handy chucking point. A fitted plug, center drilled, is stuck in the muzzle so I will turn between centers and might be handy for boring and/or threading the trunion holes. It is a copy of a very small wooden cannon barrel I aquired years ago.
It's a 6 pounder, I think. It's the only cannon tube used by the Navy and Army. As for firing, it will discourage any interlopers from coming down my drive. Now, who knows how to made quick matches with the lanard pull? Oh, I can see fun on the horizion, or is that the sheriff coming to visit? Any one have any 1.125 balls laying around for test projectiles? I promise I'll return them ,if I can find them. They should be whole but may be slightly scuffed on the sides. Also,anybody need any ~1 1/8 punched holes?