The gun companies are really pushing the 3.5" magnum 12ga shotguns. Some people just don't like the 3.5" shells because of the heavy recoil or maybe they just prefer to use the same gun that they use for skeet, trap, etc. Is it written in stone that you absolutely must use 3.5" shells for hunting ducks and geese or can a person get by ok with a 3" chambered shotgun? What do you guys usually prefer to use? Would I really be handicapping myself that bad if I went hunting geese out in the cornfield with 3" magnum shells?