For waterfoul I use the Remchokes extended ( modified ) that are marked for steel or lead for my 870 wingmaster. These chokes work great for waterfoul. I use this same choke for skeet (lead shot) and waterfoul (steel shot). These chokes are a little more money than steel only or lead only chokes but I don't have to keep changeing chokes every time I go to skeet shooting or out in the field duck/goose hunting, maybe im just lazy. Lead only or steel only chokes run about $15.00 each and the combination all in one steel/lead choke runs about $28.00 each. I just bought the remchoke FULL steel or lead for $32.00. I would rather carry 2 combination chokes around than 4 single ones.