I prefer to swing through. Swing the gun through the target much faster than the target is moving and pull the trigger as your gun barrel passes the target. Usually the delay between when your brain tells you to shoot and your finger actullay pulls the trigger will give you enough lead. For faster targets or more distant targets you need to increase the lead. The only way to learn is to practice, this will train your mind to automatically determine the lead and swing speed. The most important thing to remember is always swing through and past the target and follow through, or you will shoot behind the target nearly every time.

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