I've had three gauges of 21's. I found the 16 to be the best gun to both carry and shoot but factory shells were less available many years ago. My 12 always felt heavy but it did absorb recoil well. My 20 was the lightest, which should have made it fun to shoot and carry but never found a non tox load to shoot well for ducks and geese. Given other choices they went down the road. Like others here some guns I wish I never sold and others I never wish I'd bought.