I once came across a bunch of 75mm barrel pieces that were torch cut into sections. Unfortunately the pieces were about an inch too long to fit in my VW bug.
That was 35-years ago, now I'd like to find some pieces of 40mm Bofer barrel or similar to make a muzzle loading cannon. I see such guns are used at the Wyoming shoot. I am thinking of 4 or 5-feet long. I am not stuck on exactly 40mm. It must have a clean bore though. Anyone selling demill barrels or barrels that would be suitable for a reasonable price?