just got my new vision, tried to 'sight-in' using the scope and black aluminum arrows with points, that came in the package set. sighted the first line in the scope at 30, then walked back to 40 and shot with the first line again to see how much drop in the arrow, the 40yrd shot with the first line dropped about 18" low..did the same shot again to double check..and almost hit the first arrow just about touching at the fletch. i am very impressed with the accuarcy of this crossbow, but..an 18" drop from 30 to 40 was a big suprise to me and also dissapointing, i have shot vertical compounds for so long and this being my first x-bow i was assuming a much flatter trajectory. my 60# vertical compound has 30-40 yrd drop difference of 6-8"..is this common for crossbows?..... i endend up sighting in at 30 first line, 35 second line,40 third line and another big supprise with the fourth line being 60, just wondering is this a normal sight pattern and trajectory drop from 30-40?.. i might add that this crossbow is sure to be one great killing machine, i hit bullseye all day from 30yrds in from every shooting position, and is very awsome at quick shots 30yrds in.. it shoots great with awesome accuracy at 35 and 40yrds just hade to be aware of the yardage once i past 30...but anything inside 30 i can shoot with out even second guessing.