A popular shooting handbook states, "Ninety percent of all game birds, including ducks over decoys, are taken atanges of thirty yards and under." At 30 yards the pattern of an improved-cylinder choke is about 50 inches in diameter. That's at least 60 percent larger than a full-choke pattern at that range. See what's happening? Suddenly the physical and mental demands on the shooter are far less, presuming he's using a gun with an improved-cylinder choke. A modified choke might be a happy medium, but an improved-cylinder (or even a skeet) choke is what you need for most applications. The apparent lead needed to hit a bird crossing at 30 yards is only half that of the same bird at 40. Why handicap yourself with a gun that only an expert can shoot well, unless, of course, you are an expert?