I've used a .410 on Calif Valley Quail out here in Calif. Our hunting is tough enough with just getting a shot a them out here. Terrain can be a real thrill or simply a struggle. Most of the time, I just don't get the .410 out of the truck because I don't need the extra challenge. A 20g or 28g is challenge enough on me for the birds in my neck of the woods. I love my .410 Nitro and my M42, just don't always feel like getting them out unless the birds are really thick.