I checked out the inserts, I have a 24" 12g barrel that I put muzzleloader sites on. Drilled through the chamber, used long screws and shortened them to just stick into the chamber then polished. I have fired this with over 200 rounds of all denominations. Still have all my fingers. If using the insert what's the diff. I would never sell this barrel, throw it away maybe. I haven't had any issues. To give to someone else, not. I saw a barrel blank on Numrich Gun parts. 45 long colt 26" long 1-1/2" dia. Strait tube. 77.00. Stub. machine shop and the 12g drilled barrel. long extractor. A possible project. I have a 45LC carbine on topper wood and frame. Love that gun. Don't need a 45ACP, but it would be a project.