A friend of mines dad is a instructor and when he was doing LEO quals. he had some of the officers try this, man the stories I heard. One cop managed to put all his shots in the COM and was wicked quick at doing it, another actually dropped his pistol while drawing from his holster. But really controling the recoil is a big part. Right now with my experience with handguns I wouldnt be able to do this probably be the one to get smacked in the face with card board
. But I give props to some one who can get all com shots