Ithaca model 37 is my only experience with 16 g.
^the only 16ga I own, mine was my great uncle's built while WW2 was going on. (if I've dated it correctly) I've taken it out for grouse but didn't shoot any that day. It's only shot clay birds, but points beautifully and is surprisingly light-feeling for an all steel/wood gun. Haven't hunted grouse much in the last couple of years, and don't want this old family gun getting soaked.