[menaztricks]

When my arrow is too stiff its FOC is about 11%. Once I lower its stiffness, the FOC goes up to about 16%. I've read that 12% is something a lot of people shoot for.

 

[Guest]

How are you lowering it's stiffness ?

Proper Spine is a LOT more important than FOC.

 

[Brown Hornet]

How are you lowering it's stiffness ?

Proper Spine is a LOT more important than FOC.

He is adding point weight. By doing this it will decrease stiffness and and FOC. You can have to much FOC. Yes proper spine is important however it is fine to shoot an arrow that is on the stiff side. Much more so than one that is on the weakside.

 

[o-state1]

Spine is a lot more important. What do you mean change the stiffness?

 

[menaztricks]

I'm changing to 125gr points from 85gr and going to mini blazers. Before doing that, my arrows were completely on the red on ontarget, after doing that, theyre still a little stiff, but on the yellow. Would 15% FOC be considered too much?

 

[CoppertoneSPF15]

He is adding point weight. By doing this it will decrease stiffness and and FOC. You can have to much FOC. Yes proper spine is important however it is fine to shoot an arrow that is on the stiff side. Much more so than one that is on the weakside.

I think Brown Hornet meant to say that adding point weight will decrease stiffness and increase FOC.



Whether FOC or stiffness is more important depends on your most regular shooting environment and rig. I'm gonna guess that you're shooting a compound with a mechanical release. That being said, you can error on the stiff side and not notice much, if any difference in arrow flight consistancy.

In terms of FOC, for indoor purposes, you can get away with something as low as 7%-ish and still maintain good flight (contingent upon a properly tuned bow). If you're shooting outdoors on a regular basis and getting some wind, you're going to want your FOC in the high range (15%-ish). If it's only occasional light gusts, maybe a 10-12% FOC will work fine. You can't be sure until you experiment.

 

[Brown Hornet]

I think Brown Hornet meant to say that adding point weight will decrease stiffness and increase FOC.

Yes I did. That is what happens when I am work.

 

[nuts&bolts]

When my arrow is too stiff its FOC is about 11%. Once I lower its stiffness, the FOC goes up to about 16%. I've read that 12% is something a lot of people shoot for.

Find a length of arrow shaft that you are comfortable with.

Usually, if your draw length is 30",
then an assumed arrow shaft length of 30" is a good place to start.

Keep the arrow shaft length = AMO draw length.

Now, search for a brand of arrow.
GoldTip
Easton
Carbon Express

whatever is your favorite.

Then, search for a model of arrow,
maybe the GoldTip XT Hunter 7595

or maybe the Easton Axis 400

or maybe the Carbon Express Maxima 350 shaft.


Now, experiment with the tip weight.

Maybe 100 grain broadheads with insert
(the program OnTarget2! will plug in the correct insert weight for you).

Maybe you try the 125 grain broadheads with insert

Maybe you try the 85 grain broadheads with insert.


Keep playing with different broadheads until you get the
spine indicator in the middle of the green zone
or
the spine indicator to the right edge of the green zone.

Let's say your favorite broadheads are all 100 grains.

Now, you play with the shaft length a little shorter
or a little longer.

Maybe you have to try the GoldTip XT 7595 (stiff shaft)
and make the shaft length 1-inch longer than your AMO draw length
to make the spine indicator get into the green zone.


Maybe you have to try the GoldTip XT 5575 (weaker shaft)
and make the shaft length 1-inch shorter than your AMO draw length
to make the spine indicator get into the middle of the green zone.

Maybe you are inbetween sizes,
and have to try a different manufacturer.

Primary importance for a hunting arrow
is to get the length at a value that is comfortable for you
(usually a hunting arrow should be = AMO draw length or a little longer)
(mostly for safety reasons)

So, Primary Importance for any arrow is to get the stiffness (spine) correct.

 

[CoppertoneSPF15]

Yes I did. That is what happens when I am work.

lol... me too. :wink: :zip:

 

[menaztricks]

This setup is strictly for target shooting. For now, I will keep up with indoor 20yard shooting. In the next month or so, I will be getting new arrows and start shooting outside at 30-40yards.

 

[metalarcher]

How are you lowering it's stiffness ?

Proper Spine is a LOT more important than FOC.

Like he said...

not an expert but I have consulted with the experts... and while I have never won a major event... I do shoot.