any of those you mentioned will be fine. If the barrels are choked ic, you may also be able to shoot regular steel in it. I know the old belgium brownings, they said it would bulge the end of the barrel at the chokes, but the harm would only be cosmetic. I'd stick with the bismuth or Classic Doubles loads though if you wanna keep her looking good. I'd love to have me an old double, have a couple newer ones and one real old Walther Double from the 30's that was my dad's. He used to hunt ducks with it in the 70's, but its too pretty and has too much sentimental value to chance messing up. Never seen another walther double so it means even more.