I've tried a few, as well as the 7/8 oz Fiocchi Golden Pheasants. For the most part, they're not necessary for the uses to which I put my 28ga--which are basically skeet, 5 stand if the course doesn't have a lot of very long targets, and smaller and/or more "fragile" game birds like woodcock, ruffed grouse, and quail. And early season prairie grouse.
I wonder whether some shooters on a sporting clays course might have recourse to the 1 oz load at the longer targets? But then their guns, in general, are also a good bit heavier than the 28's most of us use for hunting.