For upland bird hunting, there is no need to "sight in a shotgun". If you have a rear sight on it, such as what you may have used for turkey hunting, take it off. To shoot birds in flight, you will not be aiming, such as you would for turkeys. You can "pattern" your shotgun, to determine it's impact point and shot density for different yardages and determine what shells give the best pattern density if you'd like. But to shoot birds on wing, you shouldn't be concentrating on the front bead of your gun. Both eyes should be focused on the target, to quickly determine its speed and range and then naturaul reaction should give you quick assessment of the lead needed to kill the bird. If, when shooting birds on wing, you are seeing your sights, you're aiming, and you will miss many times over. The choke you should be using for pheasant will be much more open than your turkey choke, and will not require you to be directly on target. Hope this helps, and Good Luck!