I used to shoot a lot of trap and used a full choke too. I've never heard of anybody using anything else for trap, but that's because your shots are at 40+ yards. I haven't done a lot of quail hunting, but when I have, they are usually about 10 yards away and don't give you much time to shoot. I'd want a 20 gauge or smaller, with either a skeet or improved cylinder choke. If you ever hit one with the center of a full choke pattern, even if you let 'em get out to 20 yards, I don't imagine you'd find much left of the bird except a few feathers.
But, maybe where you hunt you're shooting them at 50 yards. I guess anything's possible.
