If you ever took a class from Robbie Leatham, you know that the secret to speed is not going fast, but eliminating wasted motion. You don't slow down on steel. If your basics are in place, you should be able to just shoot and move like you would on paper, without the double tap. Make sure you are not stopping after every shot to make sure you hit it. Once you have sot enough of it, your ears will tell you if you hit or not.