Well a kind fellow in Calgary is sending me a 32-20 reamer, brass, dies, and bullets. So now I'll either ream a Lee Enfield barrel or try to find an Enfield barrel. The shotgun frame is 12 gauge so it'll be a challenge making the lines copacetic.

.223 would work a beaut and is still an option as I have a K. Kale action laying about doing nothing.