TC produced a 45Colt hotshot barrel for several years, but they were not marked or designed for .410 shells. If yours is like mine it will chamber an unfired 410 shell....but, try chambering a fired 3" case....no go in my barrel. TC says they are for 45Colt loaded with shot capsules. They never produced the "Hotshot" capsules or ammo in 45Colt like they did in 357 and 44Mag.
Walt