I've heard not but my experience is it does make a difference. If you are not very high up maybe not much but the higher you go the more difference it will be. I have taken my target out and shot it from my stand and I had to use shorter pins than what the target was from me. I also have a book that has an article by a guy named Ray Howell that talks about using a clinometer and range finder and making a chart with distance and angle to figure out which pin to use. It was semi-interesting but way to complicated for me. Easier for me just to actually shoot some from the stand and figure it out that way!