We hope you enjoy our “Angry Arrow” nock tuning commercial!
Will your arrows fly “angry?”
Angry Arrow Video (transcript)
You’ve tuned your bow, your form is good, but you still seem to seem to suffer from inconsistent arrow flight.
Don’t get angry… nock tune those arrows!
The N-Tune nock tuning wraps and tracers help make the process of nock tuningso much easier and precise!
So, stop robbing your arrows of penetration potential! Nock tune with N-Tune Wraps and Tracers and watch your arrows become angry, meat-seeking destroyers!
Visit AngryArrow.com and get your N-Tune Nock Tuning Wraps and Tracers.
If you already know the length and balancing point of your arrow, you can use the FOC Calculator below to quickly find the % of your arrow’s weight that is Front-Of-Center! (enter a number or slide the orange dots to the desired number)
FOC (Front Of Center) | Calculator
Arrow length from end of arrow shaft to the bottom of the nock groove (L)
inches
Distance from balance point to the bottom of the nock groove (A)
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01/31/2025 04:22 am GMT
What does FOC stand for?
“FOC” stands for Front-Of-Center (Or Forward-Of-Center) and refers to the percentage of an arrow’s overall weight that is forward of the balancing point, or, “center” of the arrow.
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01/31/2025 03:08 am GMT
How to find the “balance point” of an arrow
To find the balance point of your hunting arrow, first be sure you have already installed your nocks, vanes, inserts and broadheads/points onto your arrow.
To calculate FOC, you first need to find the “balance point” of your hunting arrow.
Using a triangular block of wood, find the exact place that your arrow balances perfectly. (If you don’t have a triangular block, you can also balance the arrow on your finger).
Once you have found the balance point of your arrow, measure from that point to the throat of your nock. This will be your balance point measurement.
Once you have measured your arrow’s length and balancing point, you can use the formula provided in the diagram above to calculate the FOC of your arrow.
Certainly bowhunters want to be the best they can be so that they can get an ethical kill. But, when it comes to FOC, there are varying opinions on whether higher or lower FOC is better.
Some bowhunters want a lighter overall arrow weight, so that the arrow is as fast as possible. The intent is often to keep the deer or other game from “ducking the string.”
The desire for a lighter arrow is often why some hunters don’t want a “higher FOC” arrow (since adding more weight to the front of the same arrow, with inserts or heavier broadheads would increase FOC, but also slow the arrow down.)
Consider heavier broadheads and/or inserts when seeking a higher FOC.An arrow with an FOC of 8-12% FOC could be considered “normal,” while a “high FOC” arrow would start around 15% and can go up to even 30%.
