Khawk,

Gravity only works on the horizonal distance. For instance,suppose the horizonal distance from your treestand to your target is 30 yards and the diagonal distance is 33 yards. Although the actual shot will travel 33 yards, gravity will only act on your arrow over the horizonal distance of 30 yards traveled.

In this example if aimed at your target as if it were 33 yards away, you would hit slightly high of your target.


Hope this helps.