My rule of thumb and the way I was taught years ago is to range out several shooting points from the base of the tree and then add in the height of the stand. Example, object 20 yards from tree. Stand is fifteen ft from ground=5 yards. Target then is 25 yards from you. This seems to work fine for me. Just remember to select your aimpoint because you are shooting at a downhill angle. You want the arrow to go thru the vitals.