I still have the first shotgun I ever bought - a Savage Model 77F 20 ga. pump. It is a knockoff of a model 37 and it killed a lot of pheasants, rabbits, puddle ducks and a few woodcock. I hacksawed the barrel off just behind the adjustable choke and it was death out to a maximum of thirty yards. (go ahead Dave with the "black hole" comment).
And then there's the .410 Skeet-er...