It's possible to get that kind of accuracy out to about that distance (10yds), but that's about the limit of steel BBs, even from a good quality smoothbore. I've done a lot of shooting with airguns using steel BBs from smooth & rifled bores, pellets from rifled bores and even some lead BBs from rifled bores. Steel BBs, in my experience, seem to be less accurate from rifled bores than from smoothbores, probably because they're significantly undersize for the rifled bores. Pellets from rifled bores are more accurate than steel BBs from any bore size. Lead BBs from a rifled bore can be very accurate, but they shouldn't be used in smoothbores as they will be oversize.
The comments about wearing out rifled bores with steel BBs are also correct in my experience. I shot out the steel barrel of my first pellet gun using steel BBs. It would have likely lasted literally forever had I used only lead pellets. I wouldn't consider using anything other than lead pellets or lead BBs in a rifled airgun barrel unless I considered the airgun (or at least the barrel) disposable.
