Dont be a noob. Dont spray n pray. Its so unbecoming. If Rockstars auto-aim history is anything to go by, aiming at an enemy in GTA V will lock you directly onto the centre-of-mass, where youd usually aim in a real life combat situation. Of course, a real boss would have auto-aim turned off, but with it on you can still get yourself into middle-management with ease. A quick upward flick of the right analogue stick will usually zero you in on an easy, stylish head shot which as you probably know ceases returning fire pretty sharpish.