I shoot 2 3/4" shells from a 20 gauge and they die quite nicely. The extra inches of barrel is fine for knocking down 45 yard water fowl. A big old bird on the ground at 25-35 yards only needs a couple of pellets in the head and neck so my vote is shorter and maneuverable is quicker and more likely to get a good shot off. You are good to go with what you have.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.