[quote]ORIGINAL: SwampCollie

Stat, Quik and Mauser inspired me to do my own test by their various contributive posts, so thank you to the three of ya.

Based on Quiks computer calc, here is what my 3D arrows should be doing with my speeds, and a (roughly) 25 yard pin.

20 = +1.67"
30 = -2.52
40 = -10.06"
50 = -20.96


Here are the actual results of my own test. Keep in mind I only did one. I ain't the greatest archer in Sherwood, but I do manage to hold my own. Apparently, my sights need a little bit of correcting to the right (see picture).....

I measured to the nearest 1/8th of an inch, using the center of the arrow as my guide. Again, this ain't the Discovery Channel.

~25 yard pin:

20 = +2.25"
30 = +1.38"
40 = -4.25"
50 = -11.13"

I think that the trajectory calc would be more accurate if it took in to accountthe weight of the arrow, plus what sort of fletching you are shooting. I am shooting straight/offset right feathers (4"), and my arrows weight right at 325gr.



[/quote
If you know the speed of the arrow, the actual weight of the arrow will make little difference. I realize that no calculator is perfect for everyone, but you shot high at 30 yards with a 25 yard pin, so there is probably more shooting error than calculator error. Although at the longer ranges you shot, 50 yards, your arrow weight will start to make a bigger difference.