scaupstopper, Do you understand the differance between drop and trajectory? Drop is measured down from an arrow shot at perfect level,trajectory is shooting the arrow at a slight upward angle to use the power of the bow to keep it close to the line of sight. For instance I sight my 2x rifle scope with one cross hair in dead on at 27 yards so it hits 3.5 inches high at 20 yd 2" high at 25yds and 2 low at 30 yds which is what I limit myself to since I don't like having to trail wounded deer that jumped the string. Lee