On a recent deer hunt in the interior we ran in to areas with a lot of grouse. Both ruffed and a few blues higher up. They were extremely skitish and were quick to fly when they would beat their wings hard and fast to do a low sprint through the underbrush then glide as far as they could and land completely out of sight.
I hunted a couple of days by myself on the way home and decided to get a little bit serious about chicken hunting one afternoon with my .22 Cooey with a 3/8" bolt for a peep sight
Spotting one far away then stalking slowly and carefully using the cover to get no closer than about 40 yards without being detected I was able to get a nice fat ruffy for supper. I too shoot for the base of the neck/backbone area and the one I took died instantly with the backbone and one wing broken - zero damage to the breast. 
I hunted a couple of days by myself on the way home and decided to get a little bit serious about chicken hunting one afternoon with my .22 Cooey with a 3/8" bolt for a peep sight