Tuning/Arrow Build Info

Procedures for bow tuning, arrow building/tuning, and more coming soon!

 

We are currently working on a detailed break down of the cause/effect from the various adjustments that can be made to a bow.  We will also be creating a reference chart. 

 

For the time being their is a ton of great information available in the new app "Bow Shop Bible".  Make sure to check it out here - https://bowshopbible.com  If I am trying to assist you with tuning over the phone this app will make a great reference tool.

 

*Tuned is tuned.  Period.*

 Key Points:

  • Bow should be set to all factory specs: Axle to axle, brace height, timing, sync, cam lean, etc.
  • Rest should be centered (majority of bows 13/16th of an inch)
  • Rest and Nocking point should be level with arrow running through the Berger hole
  • Left/Right tears are primarily indicating a misalignment of the rest and the strings path during its power stroke.  The goal is for the rest to stay within 1/16th of true center.  To accomplish this mass adjustments should be made via yoke adjustments or shimming to adjust cam lean and thus correct the string position.  In the majority of cases these mass adjustments will be done in the first 10-15 yards of bare shaft tuning.  Beyond this point mass adjustment will likely be too large and at that point you will fine tune using the rest.
    • When a misalignment is present, the side of the shaft will push against the rest.  This pressure will cause the tail to rebound and kick away from the side experiencing the pressure.
    • Spine changes can alleviate this as the amount of flex will alter the amount of pressure created, but this is not the preferred method as it means you are forcing the shaft to flex more than desired which is inefficient and can lead to other flight issues from being underspined
  • Up/Down tears are indicating that nock travel is present.  This could be from the cam sync, timing, tiller, nocking point, etc.  I prefer to tune with a known stiff shaft in order to be able to see the nock travel easier and correct it.
    • If timing, sync, tiller, arrow level, etc all look correct but a vertical tear still exists then likely the nocking point is slightly off of "center".  Move the rest & nocking point up/down together to maintain arrow level to correct.
    • If a nock high exists after checking all of this then the shaft may be reacting weak.  Reduce point weight or draw weight to confirm if the tear improves.
      • Nock high can be a weak reaction as the shaft will flex the path of least resistance (up) causing the point and nock to be down during launch.  The mass at the front of the shaft resists the shaft straightening and causes the tail to raise as the shaft straightens out.  

Arrow flight quality is a critical piece of your accuracy with broadheads (they should hit with your fieldpoints) and is a major factor in your penetration.  Do everything you possibly can to achieve perfect arrow flight!