I have my Remington 870 20ga that has carried me through the deer woods since I first started hunting. I would like it to be more versatile and allow me to hunt a variety of species, seeing as I don't have the means to have dedicated guns. I have recently discovered the 20ga to be a more than adequate turkey gun using the right set up. My question is, is the 20ga capable, using the right set up, at being an adequate shotgun for waterfowl?