With regard to Gambel quail, in the past 35 years that has been the majority of my bird hunting time. I use a 20ga Parker choked skeet and Modified. Best commercial loads are 7 1/2shot 7/8 OZ. But mostly I use handloads of 3/4oz of 7 shot. I found the 3/4oz of 7s produced very few runners after being hit. The velocity of that load is not known but seems a little quicker than the 7/8oz loads in the commercial shells. The skeet choke is fine out to 30yds and the modified has made some astonishing long shots from 45 to 50 yds. Have never patterned the gun with these loads but think they may be a little tighter than their designations would indicate. The point is choke names are poor guides for performance. Have to see how each gun and load performs before making generalized statements. My modified is clearly shooting as well at distance as most Full chokes.