Just for clarification,I also load Bismuth in these two gauges for my guns that have a lot of original choke.ie over 20 thou,and would not remove choke for the sake of shooting steel from a sound original gun. The lower pressure/high velocity steel loads can be achieved using Alliant "Steel" powder and Sam 1 wads by Reloading Specialities and Federal cases.The recipies are published by them.

Better to keep your mouth shut and be thought stupid,than open it and confirm.