According to the arrow trajectory calculator link below, my arrow drops 51 inches at 40 yards. How is this so when at 40 yards, my arrow actually only drops 14 inches below where I aim? I understand there's a slight upward travel for the first 15 yards of so but that plus 14 doesn't add up to 51 lost verticle inches!
My set-up is a Vectrix at 26" draw length, 311 grain arrow, with 30 grains on the string, all of which trips the chrono at 250 fps. My arrows are CX maxima 250 3-d selects cut at 26" tipped with 85 grains. Is there something I'm not understanding or is this program just waaay off?
http://home.att.net/~sajackson/ballistics.html