Okay....The 3 " 20 gauge load is NOT the same...According to your figures, it's a WHOLE 113 FPS ( MV) slower...My, that's impressive..

However, round shot is a very inefficient projectile, and 113 FPS of MV doesn't mean s*** to a pheasant at 20, 30, or 40 yards... I'm saying a 20 gauge with 1 1/4 oz. of shot will kill a bird at the same distance as a 12 gauge or a 16 gauge with the same shot charge weight, assuming all guns pattern equally, give or take a couple yards....

Shot charge weight ( pellet count)is a whole lot more important than a couple hundred FPS of MV, as far as lead shot is concerned, at least within the velocity ranges of 1050 -1350 FPS... Often the lower velocity loads give more even patterns...