Trigger control is critical for an accurate shooter. The shooter should press the trigger smoothly so that the sights remain on the target. With the pad of the index finger on the center of the trigger, pull the trigger to the rear to fire the first shot.
Follow-through occurs when you keep contact with the trigger and only let the trigger release to the “reset position” between shots. Do not allow the trigger to come forward after a shot any more than is needed to reset the trigger and get your sights back on target. As Lynn Givens says, “The cycle of firing a shot does NOT end at “Bang!”; it ends when you are back on target, trigger is reset, the sights are realigned, and you are ready to fire again.”
If your finger is not pulling straight back, you may be slightly pulling or pushing your muzzle.