As for shooting little birds with large diameter shot, I don’t have a problem with it. My feeling is, it’s not the size of the hole you put in the bird, which, after all, is only a thousandth or two bigger as you go up in shot size; it’s the number of holes, and that’s even worse with little shot when the pellets stay in the bird where you can bite them later. Big shot tends to plow right through the meat and either pass through or lodge in bones and body cavities where they aren’t a danger to your teeth. I routinely shoot greenwing teal—the smallest duck—with the same 2s I use on mallards. A few big holes are easier to eat around than lots of smaller ones.