Seems pretty basic you have a scope that has 1/4 min turruts and every click at 100 yds raises the POI a 1/4in. What happens when you get into 400-600 yards shots. Is there a formula that needs to be figured out or a book with charts, I'd hate to see what you have to do to get a hit at 1000yds.Hope you can send me looking in the right direction.