Mr.D, I was thinking sdrawkcab when I thought to use my 40 yd pin at a 5yd deer. It's the other way around, I should actually be using my 20 pin butaiming 4-6 inches low from the intended mark. Correct?

Arthur P, your mention of the Pythagorean Theorum leads me to believe that it doesn't matter how high you are in the tree, you must always shoot at the deer depending on how far it is from the base of the tree. As of right now, it makes perfect sense to me because in your example, even though the arrow is flying a total of 14 yards, when measured in the total amount of HORIZONTAL distance traveled, it's only 10 yds. This 10 yds represents the amount of time ordistance gravity has to work on pulling the arrow down.