You guys could keep an eye peeled for a .452 barrel liner 24 inches long. Odd thing to find, but if you see it setting forlornly on a gunshow table somewhere, keep me in mind. If it’s $75, I’d probably get my wallet out.
I’ve got a Rossi 92 pre-safety in 45 colt with a 24″ Octagon barrel. I want to shoot some silhouette competitions with it, but the chamber is way too big. Makes the brass look like it’s pregnant with twins. If I sleeve it and push in a minimum chamber, I think it would do quite well.