Might be interesting to ask fitters who use adjustable try stocks what they find when setting up SxS guns. A stock head for each make of gun might not be available, so info might be limited to guns that can be attached to the try stock.

I recall an article by Chris Batha about small gauge SxS guns needing high combs to deal with barrel flip. I cannot recall why barrel flip is exaggerated in small gauge (28-gauge, for example). The barrels are thin and light, but recoil is low, seems the effects might offset, but apparently not in his experience.