A couple of observances:
I know of zero competition SC shooters using a gun heavier than 9.5 lbs., with most using a gun weighing 9 lbs. or a hair less, max. I also don't think an SKB o/u can weigh 10 1/2 lbs. unless its crammed with extra weights front and back.
Clayshooting games like Skeet, Trap, and Sporting Clays, and variations on each, require a proper gun IF you are a serious competitive shooter. Casual shooters who say they are just out for fun and don't keep score are free to shoot whatever they want or need to use to remain proficient in the field with a particular gun(s). And that is just fine. But please don't tell me score doesn't matter, because it's way more fun to break the little orange bastards than to miss them. The guy who walks out of an SC station having missed 8 out of 8 targets with his 6 1/4 lb. Churchill and is laughing and yucking it up like "so what, I'm just shooting for fun", ain't havin' fun...
JR