Has anyone done any comparison between the 2 shell sizes with the same shot size? How much of a pellet increase are you getting at set yardages? I am getting ready to shoot Hevi 3" 7's but am wondering if I should have gotten 3 1/2" instead.
Try both and let your gun and pattern testing make the decision. Some guns actually pattern better with the shorter shell/ lighter payload.
It just depends on your particular gun.