we don't just practice center mass anymore...too many bad guys can afford "vests". We shoot 2 to the body, 1 to the head....we also practice loading and re-loading one handed, and off hand loading one handed...never quit...practice these things enough, and they become second nature...you don't even think about it...and one other drill you should practice, with a dummy round, is clearing a jammed weapon. Tap, roll, rack....Tap to make sure your magazine is all the way in, roll to the side to allow jammed shell, to fall out as you rack the slide...you "wheel" gunners don't have to worry about this..lol..