Actually, we have solved the deformation problem by developing fine synthetic fillers to pour in the shot cup with the buckshot, so that all the shot is supported, rather than just rubbing gainst one or more pellets under it. That has improved the patterns for buckshot tremendously. Also, reducing the velocity on buckshot loads to below the speed of sound helps the patterns. We are talking patterns from 10 to 25 yards, not 40, 50, or 100, however. Yes, buckshot is legal for deer in a few states, but the deer are small, the ground cover very thick, and the distance you can even see deer are very short. Aiming a rifle will only have you looking at where the deer were, as they are most often seen running and leaping past hunters. You have to use a shotgun like a shotgun, and not a rifle. You have to swing on the target, and be prepared to fire on that leaping deer just as you would a bouncing rabbit. The shots are at short range, or you only cripple deer that die slowly someplace out of sight.
