When I was living in an area that was pretty much all Sporting Clays (practically no skeet or trap) back in the late 80's early 90's, I used 1-oz #8 handloads w/IC/Mod chokes in my Citori. Never felt handicapped, and if I was on, the birds broke. Never figured why guys used to spend all this extra time making up "specialty loads" like Spreaders, long-range, etc (other than for fun, of course LOL). Sporting courses may have changed since then, but I'd still go out and feel pretty confident with my loads.
As always, YMMV
Ed