I had a few boxes of the winchester faststeel #6s they worked just fine (12g). I was in contact with CWS last year about the possibility of using an air rifle (500+ fps) and the manager John something (have to check for his last name)seemed to be good with it, I also forwarded my email chain to OFAH so they could get behind it too, but there was no further communication with them after the initial and no air rifle season added. I guess they would have to revise the migratory bird act to allow rifles (air) for doves only and that doesn't happen to fast.
With doves, I either walk the edges of crops with the lab and flush, spot and stalk, or my favorite sit out back and pass shoot them in the back yard with the Do-all-outdoors aerial assault for clays in between doves and starlings!