FAQ

Frequently Asked Questions

This list of questions and answers will continually be updated.  If you have a question that is not answered, feel free to send us a message HERE

 Terminology:

  • TAW: Total arrow weight including point, insert/outsert system, shaft, wrap, vanes/feathers, and nock.  General minimum TAW recommendations, assuming the other penetration factors are being accounted for, are below:
    • Deer Sized Game: 450gr+
    • Elk Sized Game:  550gr+
    • Moose/Bison/Dangerous Game: 650gr+

 

  • FOC: Weight forward of center is a measure of the position of the shaft balance point in reference to its physical center point.  Based on Dr. Ed Ashby's research, near or above 19% FOC is desired.

    The AMO-Standard F.O.C. balance formula is: %FOC = (100x(A-L/2))/L 

    For those of you who prefer to calculate your FOC the old way with a calculator, this is for you: 

    A = Balance point as measured from the throat of the nock to the point of balance. 
    L = Total arrow length as measured from the throat of the nock to the back of the point.
    (Do not include the length of the point in this measurement.) 

    1.  Measure the arrow length from the throat of the nock to the end of the shaft. (Back of the point) e.g. 28.5"

    2.  Divide the total length number by two (2). (Or multiply it by 0.5.) e.g. 28.5/2 = 14.25 or 28.5 x 0.5 = 14.25

    3.  Find the arrow's balance point. Measured from the nock throat to the balance point. e.g. 19.0" 

    4.  Subtract half the total length from the balance point number. e.g. 19.0" - 14.25" = 4.75" 

    5.  Multiply that result by 100. e.g. 4.75 x 100 = 475

    6.  Now divide that number by the total arrow length. e.g. 475 / 28.5 = 16.6% FOC

    Example: 
    A 28.50” (BOP) arrow has a balance point of 19.00”. 

    Half of the total arrow length is 14.25. 

    Subtract 14.25 from the 19" and you get 4.75". 

    Multiply that by 100 = 475. 

    Now divide 475 by the total length which is 28.5 = 16.6. 

    Your FOC measurement is 16.6%

     



     

    • BOP: Base of point - AMO standard for shaft measurement.  This measurement allows us to match the position the broadhead is in at full draw regardless of the components used.  This is preferred over "carbon to carbon" measurements which leave the actual broadhead position dependant on the components (insert/haflout/outsert).

     

    • KE: Kinetic energy is the total energy of the arrow in motion measured in ft-lbs.  This includes the forward motion, oscillations (flex), vibrations, noise, etc and does not directly translate to penetration potential.  We primarily use KE to indicate a bows efficiency change as arrow weight changes.

     

    • Momentum: The actual FORCE of the arrow in motion measured in slug-ft/s.  This is the actual driving force of the arrow in the direction of travel.

     

    • Inertia: The resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion.  The greater the arrows mass the more it will resist changes in speed or direction when resistance is encountered.  This is why momentum derived from mass instead of speed is so important.  High levels of momentum that are primarily dependent on speed (low mass) will have low inertia and will lose speed at a faster rate.  The greater the mass the more stable the momentum will be and the better it will carry itself downrange.

     

    Questions & Answers

    Delivery Time Frame - How quickly can I have my order?

    The vast majority of items are stocked and readily available.  If anything is out of stock when your order is received we will reach out and let you know what the expected time frame is.

    Orders that do not require building (arrows - uncut, loose inserts, loose fletching/factory fletching) will typically ship within 1 or 2 business days via your selected shipping method.

    Orders that need to be custom built will typically ship within 3-5 business days.  If there will be any delays we will notify you when the order is received.

    Expediting requests will be evaluated on a case by case basis.

     

    Speed
    • What speed can I expect with a heavier arrow?
    • How heavy of an arrow is too heavy?
    • How slow is too slow?

    The issue with most online arrow speed calculators is that they all seem to use a static speed loss per grain of additional arrow weight.  This works fairly well at low arrow weights close to IBO (5gr per pound of draw weight).  The problem is that as arrow weight increases the bow will become more efficient and your level of KE and momentum will increase. Typical online calculators do not account for this and will be further and further off as the arrow weight increases. The increase in efficiency occurs fairly linearly up until around 10-12gr per pound and then continues increasing at a slower rate up past 20gr per pound.   The calculator I designed based on average bow efficiency gain is now available!  Click Here

    Test conducted with a 42lb Elite Spirit set at a 26" draw length.  Speed for each arrow weight was averaged over a minimum of 10 shots.

    *I have not been able to cause a decrease in KE with an increase of arrow weight.  I have tested up to approximately 25gr per pound of draw weight*

    From this point, it is up to YOU to determine where YOU ARE COMFORTABLE.  Think of arrow weight like insurance for when things go wrong.  You want the best insurance you can get, but you need to be comfortable with the payment (speed loss).  Take into account your desired target animals and how likely it is that insurance will be needed. 

    *The ONLY CON to a heavy arrow is trajectory / The ONLY PRO to a light arrow is trajectory* 

     

    Bow Work

    • How should I ship my bow?
    • How much will shipping cost?
    • What should I send with my bow?
    • Will my bow be perfect and ready to hunt when I receive it?

    When sending a bow to DAS for new string installation or tuning you will be required to ship the bow to us (unless you're local).  The best method to do this would be the box and packing material the bow was originally shipped in from the manufacturer.  If you no longer have the original box, then you will need to buy a box which will fit your bow. 

    We typically use USPS for all of our shipping needs.  You can estimate your shipping costs on their website (https://postcalc.usps.com/).

    Our preferred method of setting up a bow is with the bow setup exactly how you will be using it.  This eliminates potential variables.  This is less critical if we are simply setting the bow to factory specifications for you to fine tune on your own, but if you are questioning if something should be sent with just reach out to us and we can discuss based on the situation. 

    Some people want to handle all of the fine tuning on their own, but don't have a press to make sure the bow is fully in spec.  Other people want the bow to be as close to hunt ready as possible when they receive it.  Due to this we offer different levels of tuning based on what you are wanting.  Regardless of the level of tuning you select, it needs to be understood that no two people grip a bow exactly the same way.  Assuming you have clean form and a relaxed grip, this will only result in minor variation, but we always recommend verifying flight and fine tuning out of your own hand as the final step in the tuning process.