Which barrels are compatible with steel shot other than the steel shot barrel?

Any Remington barrel with RemChokes, if they are equipped with steel compatible RemChokes.
I would opine further that any 1100 barrel with a Modified or more open choke and using #2 or smaller steel shot would be okay as well. At one time Remington voiced this, but as time passed they changed. I can only assume that more lawyers got involved. I have never seen a barrel damaged used within those parameters. I have seen plenty damaged by other circumstances. The wads today are also much better.