For everything from Desert Quail to SD pheasant I seem to have no problem with a 20ga Parker choked Skeet and Modified. Loads for the quail I prefer 3/4oz of 7shot when I can find it. For Pheasant 1 oz of 5s works for me. I know many espouse the 12ga for pheasant but I have no problems with the 20 and 1oz of shot. I guess shooting the same 20ga for everything for 30 plus years may have something to do with it.