Means equals extremes
Using a spacing of 4� for the scope rings and 100 yards (3600 inches) for the sighting it is very simple to see how much movement the rings will get you. If you move the rings up, down or sideways .015� you can write 4� and .015� on one line and right below it you write 3600� and a �?�. You then multiply the 3600 ( a mean) times the .015 (a mean) giving you 54 (an extreme). You divide the 54 by the 4 (an extreme) resulting in 13.5� (an extreme) of movement.
