Both gun manufacturers and reloading companies strongly recommended against using Daisy BB's, etc, because they are so much harder than the steel shot being used in shotshells. On top of that, both feel that conventional plastic wads aren't thick enough to prevent bore erosion with steel shotshell shot, and only special thicker ones should be used.
Digesting all that, I wouldn't use the Daisy BB's at all, and I wouldn't use steel shotshell BB's without the special wads.
In the days of lead shot for waterfowl I used my 12 gauge double quite a bit for ducks over decoys and jump shooting, mostly with 1 1/8-ounce loads of #4's or #5's. When the steel shot requirement landed, I retired the 12 from duck hunts, then traded it off because I also had a 20 for snowshoe hares over beagles (3/4- and 7/8-ounce loads of #6's). When the beagles eventually slipped off to meet their maker I traded that off, too.
I've given serious thought recently to picking up either a 10 or a 12 again and using Bismuth shot for ducks. Anyone here experienced?