FOC
 

I was wondering how you would calculate FOC or Balance point of an arrow
I shoot a 29.5 in Carbon Express CX 200 arrow. I tried figuring it out myself and got 7.8 percent but then when I went to the Bow Jackson Website, they calculated my foc at 10.2 percent. I was wondering how to calculate FOC and if I am right about how I did the calculation or if The website is right.
Thank You
Buckkilla

RE: FOC
 

100 (B-L/2)
-------------
L

B= Distance from nock to ballance point
L= total arrow length



Example of my arrows: total arrow length is 31.5" (L) distance to ballance point is 20" (B).

100 (20 - 31.5/2)
-------------------- = 13.49%
31.5


Bowjackson gives me 13%