calculate my foc!!!!

nate121080 · 05-31-2003, 02:40 PM

i' m shooting a martin panther with 70#. My arrow is 27.25" from bottom of knock grove to end of shaft ( where i cut it). I' m shooting 3 4" flexi-fletch vanes on beman ICS camo hunter plus 500 (7.9gpi). The insert weight is 23 gr and knock weight is 13 grain. I' m either going to shoot 85 gr spitfires or 75gr jak hammers. Please calculate my FOC for those 2 broadheads and would you also do it using beman 400' s (9.1gpi) instead of the 500' s? Any info would be appreciated!!

nub · 05-31-2003, 02:56 PM

Calculate it yourself. http://www.bowjackson.com/

Sq2Hunter · 05-31-2003, 08:20 PM

theres also another calculator on goldtips arrows website.....just a heads up.

Buckbuster4ou · 06-01-2003, 04:31 PM

FOC

All measurements are from the bottom of the nock groove.

With broadhead on, find the balance point of the arrow. Measure from nock groove. Wright this number down.

Arrow length divided by 2. Subtract this # from the balance point #.
Then divide this # by the arrow length. Multiply by 100 to get percentage.

10% - 15% is desired.

Got this from Petersens Bowhunting Mag.