I agree with PawDaddy said about weight, but I would add that shorter guns, even compared with guns of identical weight, tend to "Jump" more... I've got an 870 turkey gun with a short barrel that smacks you in the cheek ever time you shoot it, even with low recoil 8s. It also seems to magnify the problem when shooting a synthetic stock, although that may be more bias than science. In short, if you're very sensitive to recoil, don't get a short barrel, even if the gun is heavy.