here' s my 2 cents. I simply use my rangefinder from a 20ft platform which is my normal hunting height to my block target. I sight one pin in at 25yards and my second at 40 yards which I have yet to use. Now for the shot. if the deer is within 30 yards hold dead center and you will hit the kill. at 10 yards I am about 1.5 inches high and at 30 yards I am about 2 inches low. the key for me is sighting in with my rangefinder from the height I normally hunt at to my 25 yard mark. when I range trees while hunting, i normally range the bases or about deers height on the tree. This method has proven invaluable to me. hope this helps.