There are 4 aiming methods in 5 pin bowling. The one that produces the best results is spot bowling. This uses a fixed target 15 feet from the foul line. To properly understand spot bowling you need to better understand the rifle technique. When you have found your staring position on the approach this is the rear sight. The dot at the foul line where the ball is released is the front sight and the arrow which the ball rolls over is the target.
It is suggested that the target remains the same and that only the right sight and front sight is adjusted.