It may not be of much help but one thing that helps me on swingers is to pick a point during the walk through where the swinger comes to a stop. Have a reference point you are going to aim at in your mind a bring the gun to that point. This reference point will be where the swinger is at its point of stopping to go the other direction. I have had better luck bringing my gun to this point, waiting for the swinger to move into my line of fire and shooting two or three quick shots.