This Winchester Supreme Waterfowl shell is the perfect option for your marshy excursions. It's got a 3-1/2" with 1-1/2 Ounces of #3 Steel shot which blasts out of the muzzle at 1475 fps, so it is a good choice for swan hunts.
Supreme High Velocity Drylok Super Steel Shotshells give you the ultimate in water resistant, high velocity knock down performance in any foul weather hunting condition. Use to hunt waterfowl such as ducks and geese.
25 rounds per box. To buy a full case, order 10 boxes.
Ammo price is per box