Of course, all my ammunition would fit all my guns if I shot only 16s or only 20s, but I don't. No other gauge comes close to being as versatile as the 12. Mine range from a double weighing less than most 20 gauges to a near 9-pound target gun with 32 inch barrels, and I shoot loads from 3/ 4 of an ounce (targets) up to 1 3/ 4 ounces (turkeys) out of them. The big bore of the 12 gauge helps it pattern well with a wide variety of payloads. If you shoot steel shot, it takes a hull the size of a 12 gauge's to hold enough of the light pellets to kill a duck or a goose. And, as much fun as light, skinny small bores are to handle, I believe it's easier to shoot well with a gun that's a little more substantial and hand-filling.