Romancenturian - thanks for the input. I forgot about gunbroker they may be able to fill my needs. I understand what you are saying about Hevishot and Bismuth for a 10 but I have two caveats.
1. I spoke to an old gunsmith when I bought the Mag 10 about whether the barrel was ok for steel. He told me that he had never seen a blown or bulged Mag 10 barrel but he had seen the chokes blown out. In other words, the gun instead of being full choked was now worn down to cylinder or wide open. I had this confirmed the one time I got through to an Ithica gunsmith. He suggested I send the gun in and have it rebored to modified for steel shot. I figured if I like the way the gun works I would have the barrel cut down and fitted with choke tubes. I know Hastings does this among others. Or, just keep the 32" with full choke and shoot Bismuth.
2. I load Bismuth in 3" & 2 3/4" 12 gauge and like the way it shoots and patterns. It did well in the Mag 10, very superior to the Federal Steel both on the pattern board and in the field. One shot kills were normal. The cycling problem kept me from swinging on another bird when flocks came in.
The Hevishot was a lark left over from a 10 ga double I was shooting. It did not pattern as well as the Bismuth, I think because of the full choke. Nor did it perform as well in the field.
All that having been said, if you like steel - shoot steel, if you like bismuth - shoot bismuth. Different strokes for different folks.
I do have a question for you though. How do you get to the spring in the stock to clean and oil it or do you clean it? I can't seem to access it.