I am not a great wing shot, but am decent. I have used all varieties of shot gun barrels. I learned that a high vent rib on a trap gun that shoots fairly high. makes hitting easier. A target floating above the bead is easier to see and adjust ones swing . Side by sides have always been impossible for me to hit with , I find i tend to follow with left barrel ( being right handed) but i did shoot one with a goofy looking rib that helped. Having a clean flat sight plane is where the rib helps .Knowing the guns point of impact( high, low or dead on) is a function of fit and actual shooting a few sight in rounds is key to better shooting. All of this is just my humble opinion.....
