FOC and Math ( pun intended)

The Butcher · Post by **The Butcher** » Tue Jan 31, 2006 6:10 pm

I never was good in Math, can someone tell me what percent my Foc is with a 20-5/8" shaft, broadhead included. 19" shaft without broadhead, with a balance point at 9 inches from the tip of the broadhead. And after you figure it out, should I be shooting a lighter head, or a shorter profile head, or what to get the right FOC. As of now, I've come up with a whole $^%^%$$##$% mess. I usuall just shoot my field tips, and shoot my hunting heads until I find a quiver full that fly to the spot and quit worrying about it. I'm alway open to a better way. But my numbers ain't jiveing or is that jiving "they just ain't right" Butcher

mikew · Post by **mikew** » Tue Jan 31, 2006 6:47 pm

According to the following auto-magic calculator:
http://home.att.net/~sajackson/archery9.html

I get 6.3% if I use 20 5/8 as the arrow length.

Seems too small an FOC to me and you'd want a heavier broadhead.

Please, someone else check this too.

-Mike

Bucktail · Post by **Bucktail** » Tue Jan 31, 2006 7:52 pm

MikeC,

Iget the same answer, if I'm doing it correctly.

Butcher,

Do you have Brass inserts, or Alum? Feathers or plastic fletch?

Bucktail

The Butcher · Post by **The Butcher** » Tue Jan 31, 2006 8:56 pm

I have aluminum inserts. I need to get the foc to what? 12-13%? Thanks Butcher.

mikew · Post by **mikew** » Tue Jan 31, 2006 10:16 pm

Butcher,
Peoples' opinions vary, but a balance point 2 1/2" to 3" in front of center puts the F.O.C 12.1% to 14.5%, as a point of reference for your arrow/broadhead.

I think everyone agrees it should be at least 10%, if not a smidge more and I think having an FOC too high is better than one to low.

Hope that helps,
-Mike

Daniele · Post by **Daniele** » Wed Feb 01, 2006 4:43 am

FOC ???? MEANING PLEASE.

The Butcher · Post by **The Butcher** » Wed Feb 01, 2006 6:28 am

Front Of Center

bj · Post by bj » Wed Feb 01, 2006 8:27 am

6.360 % foc...you should have more...

things you can do !...
- change from vanes to feathers (this will increase it"slightly")
- add 25 grains to the point weight
- add a brass insert (+65 grains) - this is the way i would go...i would probably change to an 85 grain head then to get some of the speed back...

bj........