For general all round use stick with 16 Bore with 7x57r / 7x65R or 8x57 JRS, but don't discount 12 or 20 bore's either. All these calibres are good enough for most things, yet accurate and flat shooting enough that deer sized game is easy enough to take out to 150 to 200 yards if needs be.

Have a clear thought as to intended use. Is it primarily a rifle that you want, but with a shot ability to take sitting game. Or are you after a shotgun that works well on flying game, but you also have the ability to shoot a buck if opportunity presents itself. Some drillings and combinations handle beautifully - others have the handling ability of a benchrest rifle and work well from a highseat, but not much else.

Many of the two barreled over and under combinations have a pair of shot barrels and I think that is a very useful all round package. Shot / rifle for when hunting big game, but you can take a duck on the way home. But if out after ducks / grouse specifically on go the shot barrels.