I’m kind of struggling with this question. I’m so use to lead it’s tough transitioning to steel for upland birds. It’s going to be a trial and error learning experience. For dove I use to use lead #7 1/2 and #8’s. With steel probably 6’s and 7’s. Pheasants I used 6 lead. Now I’ll try 4 Steel. I accidentally bought a box of 6 steel so I’ll give that a try on pheasant too. Quail I used 7 1/2 lead. I’ll probably try 7 and 6 steel.
For ducks I use mostly #2 and #3 steel, have shot a lot of ducks over the years so I know what I can do and my limitations with 2 and 3 steel. I could see using #3 steel for pheasants. I think we are going to have to learn our limitations with steel to avoid cripples. I think there’ll be a lot more crips until hunters get use to steel.