Unlikely. I believe they stopped manufacturing them before steel shot came in. If you have it opened up to a loose Modified or a snug Imp Cyl, you should be fine and have a much more useable pattern. OR you can only use smaller shot, nothing bigger than #2. BUT, aren't the chokes on these guns established by swaging the muzzle? Also note that a short forcing cone right off the chamber is also not good with steel shot. It can be lengthened easily by a gunsmith as well. But again, we're talking about a single shot Cooey.