Years ago when our group pursued Ruffed grouse with passion, we casually kept track of birds flushed, shot at and in the bag. If we flushed 40 birds, we shot at 20 and harvested 10. This was when numbers were good and the cover we hunted offered reasonable shots. If we hunted further north in WI where evergreens were prevalent the story was different as you could have 25 close flushes and never have a clean look and shot. When grouse numbers are up the birds appear in marginal cover and increase opportunities. The birds best chance of escape is the element of surprise and they are good at it. The dog is the equalizer. Prairie birds offered a higher shooting percentage.