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The Importance of FOC in Hunting Arrows

When looking into the technical aspects of modern-day archery, it’s easy to get confused and overwhelmed by the amount of information. Often lost in the discussion of efficiency in the sport is the importance of FOC in hunting arrows.

Back when people were shooting their homemade recurve and longbows with their cedar shafts, archery was simpler. People knew the limitations of their equipment and perfected their skills within those limitations. Today, the modern equipment affords much higher efficiency and lethality, but also requires more work of the user to determine the best setup for their needs.

While draw weight and length and their relationships to arrow elements like spine are generally easy to understand and apply, weight distribution on an arrow is typically more foreign to archers, especially those new to the sport. When we talk about weight distribution, we are referring specifically to a bias on the front of the arrow, or FOC (front of center.)

To easily grasp the concept of FOC, imagine that you are holding a four-foot-long wooden shaft. On one end of the shaft is a spear point made of metal. Imagine grasping the shaft with the spear point closest to you rather than at the front of the shaft. If you throw that spear, it will wobble in the air and would possibly even turn 180 degrees. However if you throw the spear the way it was intended, with the point out in front, the shaft will fly straight being lead by the heavy spear point with the lighter shaft following behind.

The same principle applies to bowhunting arrows. Arrows that have more weight shifted to the front of the arrow will fly straighter than those that have weight balanced in the center of the arrow.

An important thing to remember when considering FOC is that as always is the case in physics, there must be a tradeoff. As expected, the more weight you add to an arrow, the more quickly it will drop. That is why it is important to find the perfect balance in your FOC distribution to ensure maximum efficiency.

We talked a few weeks back about what that percentage should be. Easton Archery, in their years of testing and research suggest that the best percentage of FOC for your arrows should be 10-15%. Visit their website and our previous article to better understand what that percentage means:


Understanding FOC is only half of the battle. Applying it can be complicated and expensive. A simple solution would be to go from 100 grain tips to 150 grain tips. This doesn’t allow for much in the way of fine tuning however, and will only get you so far. Some will replace their plastic veins with feather while others will use heavier brass inserts in their shafts. There are some ready made arrows that are tuneable and effective at getting you to the desired FOC percentage, but they are expensive.

You’re probably thinking, “Well, this is all fine and good, but I don’t want to buy all new arrows or change the ones that I have, just to have to re-tune my entire setup.” Here is where we have the ultimate solution.

The Bad Boys™ by Pro-Tracker Archery are an easy to use FOC adjustment product. They are compatible with your current bow and arrow setup, and they don’t require you to re-sight or re-tune your bow. They simply slide onto the front of the shaft, directly behind your chosen field tip or broadhead, then are ready to shoot. They come in sizes ranging from 100 grains to 400 grains, meaning that you can pick the size that will work for you and your current setup. Additionally, because they are an outsert on your arrow shaft, they will protect your arrow from impacts that would normally cause them to crack or be otherwise damaged.

Check them out here and if you have any questions, please reach out at info@pro-tracker.com.

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Pro-Tracker Radio Frequency Transmitter Alpha


The Pro-Tracker® Transmitter is a rechargeable, lightweight, water resistant transmitter that disengages from the arrow upon impact; allowing for pass-throughs. The transmitter hooks into the animal’s hide and begins sending Radio Frequency (RF) signals every three seconds for the duration of the battery life (10-12 hours). You will need the Pro-Tracker® Receiver to read and track the signal.



Pro-Tracker Ultra Lightweight Aerodynamic Aluminum Carrier


The Carrier is what screws into your arrow and holds the transmitter. It is aerodynamically designed to compensate for the weight and shape of the transmitter. Meaning minimal adjustments to your equipment for the same precision. Our Aluminum Carriers are made from a 7075 aluminum alloy which is typically used in aerospace programs. It is the strongest aluminum alloy in the market and made to resist high velocity impacts.




ReceiverYAGI Antenna

The Pro-Tracker® Radio Frequency (RF) Receiver is a compact system with an easy to attach antenna. This state of the art receiver can track up to 6 different transmitter signals at the same time. Displaying signal strength, transmitter number, current time, time spent tracking, and current battery life, all on an easy to read LED screen. Available only in the Pro-Tracker® System



Custom Carrying Case



The Pro-Tracker® Custom Carrying Case helps you keep track of your Pro-Tracker system and ensures everything stays together. Its lightweight and durable design ensures your equipment is protected while being as easy as possible to carry during your hunting trip and recovering your trophy.



USB charging station for radio frequency transmitters




This dual-charging station allows you to charge up to two transmitters at a time. It includes both a USB and outlet adapter. The outlet adapter allows you to charge your transmitters at home while the USB adapters allow you to charge your transmiters in your truck for extended hunting trips.




Pro-Tracker Radio Frequency Receiver

The patented Pro-Tracker® Recovery System will help you locate your trophy with durable state-of-the-art technology.

The compact receiver can track up to 6 different transmitters at once. Displaying signal strength, transmitter number, current time, time spent tracking, and current battery life, all on a easy to read backlit LED screen. By watching the receiver you can even determine if the animal is moving or is stationary.

Once activated upon impact with the target the transmitters have a 12 hour battery life. They are also waterproof and rechargeable so they can be reused over and over again. They come with a charging station that can be plugged into wall outlets or vehicle USB ports for extended hunting trips.



The Pro-Tracker® System has been field tested by top experts in the archery industry. With the Pro-Tracker® System you’ll see virtually no difference in the trajectory of your arrow because of the aerodynamic and lightweight design of the carriers and transmitters.

Tests have even shown the system does not impact the level of penetration the arrow has. The Pro-Tracker® System has the durability and precision to recover your trophy.

Pro-Tracker Bowhunting arrow sideview



deer huntNot only does the Pro-Tracker® system not interfere with ethical shots, but numerous wounded loss studies have shown just how much it is needed in bowhunting. According to one study done by the Oklahoma Fish and Wildlife Agency, 50% of deer that were shot were never recovered.

There are many reasons why it could become nearly impossible to recover an animal. Sometimes game only bleed internally and don’t leave a blood trail, or flee into impossible terrain. Sometimes the weather takes a sudden turn.

Whatever the reason, the Pro-Tracker® System is designed to overcome these obstacles and recover the animal without detracting from the method in which you choose to hunt. Whether in a tree stand, ground blind, or stalking your favorite game, the Pro-Tracker® System is the one sure method for the ethical recovery of all wounded game.

Q.  Is the Pro-Tracker® Legal in my State?

A.  Indicates states where we believe based on our reading of the State regulations the use of the Pro-Tracker System are prohibited.  In no way is this considered to be a legal opinion. 

Alabama: Yes

Alaska: No

Arizona: Use at your own discretion (unlawful to use electronic night vision equipment, electronically enhanced light-gathering devices, thermal imaging devices or laser sights; except for devices such as laser range finders, scopes with self illuminating reticles, and fiber optic sights with self-illuminating sights or pins that do not project a visible light onto an animal. I is unlawful to use tracking devices to aid in the taking of wild game).

Arkansas: No (It is unlawful to use electronic tracking devices to locate wildlife or computer assisted hunting equipment)

California: Use at own discretion (has several municipalities, most of which have their own additions or addendums in regards to legal hunting equipment)

Colorado: Use at own discretion (Colorado does have specific restrictions in regards to battery operated equipment on bows and arrows. Tracking devices, specifically, are not mentioned in the regulatory manual).

Connecticut: Yes

Delaware: Yes

Florida: Yes

Georgia: Use at own discretion (it is unlawful to kill or cripple game without reasonable efforts to retrieve. Unlawful to use electronic communications equipment to aid in the pursuit of game).

Hawaii: Yes

Idaho: No (cannot take big game with aid of radio telemetry)

Illinois: No (electronic devices, including but not limited to those that use radio telemetry, are not permitted)

Indiana: Yes

Iowa: Use at your own discretion (it is unlawful to use dogs, domestic animals, bait, radios, handguns, rifles and crossbows , automobiles, aircraft, electronic calls or any mechanical conveyance or device to hunt deer. You cannot use a two-way mobile radio transmitter to communicate the location or direction of game or furbearing animals, or to coordinate the movement of other hunters).

Kansas: Yes

Kentucky: No

Louisiana: Yes

Maine: Yes

Maryland: Yes

Massachusetts: Yes

Michigan: Yes

Minnesota: Yes

Missouri: Yes

Montana: No (electronic or battery-powered devices attached to a hunting bow. – A bow sight or arrow which uses artificial light, luminous chemicals such as tritium, or electronics).

Nevada: No (it is unlawful to hunt any wildlife with an arrow that has any chemical, explosive, or electronic devices attached).

Nebraska: Yes

New Hampshire: Yes

New Jersey: Yes

New Mexico: Yes

New York: Yes

North Carolina: Yes

North Dakota: Use at your own discretion (Telescopic sights, range finding devices, battery- powered or electronically lighted sights or other electronic devices attached to the bow, or the arrow, are not permitted (exception: lighted nocks and recording devices which do not aid in range finding, sighting or shooting the bow are permitted). Handheld range finding devices are legal).

Ohio: Yes

Oklahoma: Yes

Oregon: No (electronic devices may not be attached to bow or arrow).

Pennsylvania: Yes

South Carolina: Yes

South Dakota: Yes

Tennessee: Yes

Texas: Yes

Utah: Yes

Vermont: Yes

Virginia: Yes

Washington: No (It is unlawful to have any electrical equipment or electric device(s), except for illuminated nocks, attached to the bow or arrow while hunting).

West Virginia: Yes

Wisconsin: Yes

Wyoming: Yes

*Disclaimer:  This research was obtained by the staff of Pro-Tracker and is not to be considered a legal representation as to law. When using the Pro-Tracker system the user must assume any responsibility as to the State regulations that they are in. This is only a guide.