LastDaze, do yourself a favor and get some professional training. Take a class or 2 from TDSA, USSA, protective shooting solutions or from Predator here. There is a difference between a double tap and controlled pairs. Double taps are bad, controlled pairs are good, don't get in the habit of only firing 2 rounds and the most prevalent philosophy of dealing wing multiple aggressors is 'everyone gets some before anyone gets seconds'.