No point in chamber sleeving it back to anything, since it now is suitable for industrial empties. I'd like to own it just because it is big, cheap, fluid steel and can be loaded with cheap empties that can be tossed since they didn't require any modification to load. I have no curiousity about whether a sporting shotgun will withstand an industrial round. I will experiment with factory loaded industrial rounds when I am able to add a kiln gun to my collection. Does anyone have any idea how that could be accomplished? Thanks to anyone who can help me buy a kiln gun.