I have recently discovered, in shooting sporting clays, that I score more hits with light Mod. (.015") tubes in both barrels, at all range targets from 20-55 yards, than any other choke combo. That being said, I shoot a Kolar shotgun, which has .740" oversized bores, and the forcing cones are minimal, which I'm sure evens out the patterns. I ask my fellow shooters, especially the ones who hit targets consistently, and they almost all shoot IC/Mod fixed chokes, or light Mod as I do. The sole exception is one fellow who shoots a Zoli O/U 12 that has .027" fixed chokes top & bottom, and crushes targets at all distances up to 60 yards out. My ability is such that I probably couldn't break anything with his gun. Don't know if this helps you at all, but there it is. Sandlapper