New Pro Version
In an effort to to improve the accuracy and consistency of our Match Grade Custom Bolts we have built a new version called the “Pro” version. The “Standard” version is the original custom bolt and is still as accurate as ever. The difference between the Pro and Standard although very small will still make a difference.
Pro vs Standard
While the difference is very small it will make a difference in consistency and accuracy.
- Pro: +/- .001″
- Standard: +/- .005″
- Weight Variation Across 1 Dozen Bolts
- Pro: +/- ½ grain
- Standard: +/- 2 grains
True custom bolts have at least four important components: (1) Static spine selection, (2) spine indexing, (3) extreme front-of-center (FOC) , and (4) hand-crafted with the most precise fletching available today.
Static Spine Selection and Spine Indexing
Static spine matching is often confused with spine indexing. Spine matching is all about deflection, or the stiffness of the bolt. It is important to match the stiffness of the bolt to the poundage and draw stroke of the crossbow,that is why we use a selection of bolts including GT Laser II, Laser III, and Black Eagle executioner and different lengths. Basically like you would do with a vertical bow. Spine indexing has to do with locating the stiff, and weak spot on the bolt. Spine indexing is the most important accuracy factor in custom bolts. Extremely sensitive tooling is needed to accurately define “low, and high” spine in a carbon shaft, and all carbon shafts have a low and high spine. Our research has shown that group shooting off of a shooting machine at 25 yards, with 6 bolts that have been spine indexed vs 6 bolts with factory fletching. The bolts that were spine indexed averaged a 68% tighter group.
The next precision element of Custom Bolts is that of front-of-center (FOC). The FOC refers to the balance point of a bolt. The percentage of FOC indicates what percent the balance point is forward of the center of the shaft, the higher the percentage, the better performance your bolt will deliver. FOC has two benefits for precision-minded archers. Archers can expect to see tighter groups with field tips and broadheads. The second advantage FOC creates is more momentum and less drag, thus deeper penetration on target! Borkholder Archery’s method of creating FOC is with a brass insert. Increasing the weight of your field tip will also create similar results. A benefit of using a brass insert is our ability to create a substantially larger amount of FOC than is possible with a field tip alone, while still using a 100 grain tip. This method is used on all of our custom bolts, which gives the consumer a larger selection of broadheads to choose from when ordering from us. We like to have 20% or more FOC This really comes into play at the longer yardages with marginal shot placement like the shoulder, having a brass insert or not could be the difference of your broadhead stopping in the bone or getting into the vitals.
The final element of custom bolts is that of precision fletching. By using state of the art equipment and a highly trained expert creates the most accurate bolts available today. As a hunter, it is our responsibility to take quick, clean kills. The precision fletching jigs used on all of our custom bolts are within 1/72 of a degree of being spaced 120 degrees apart. It is very important that your vanes are spaced 120 deg apart for optimal vane performance. We also use a 1/8 deg. offset instead of a ½ or full degree of helical like most large manufacturers. This final element helps to eliminate drag which will create greater KE which means a more ethical hunting experience.
Return Policy on Bolts
We stand behind the accuracy and quality of our bolts but if for any reason you choose to return your bolts you will be refunded the full amount if the bolts are untampered. There will be a 50% restocking fee if there is any alteration made to the bolts (markings on vanes or weight alterations).
Upgrade to Lumenok Lighted Nocks
With lighted nocks, you’ll never wonder where you’re bolt went. It’s great for target shooting but most important during the hunt when the environment is less controlled. Hunt with confidence when using a Burt Coyote Lumenok Lighted Nock with your crossbow bolt.
2 Popular Add-ons
With the Lumenok Extinguisher, you can quickly and easily do 2 things. (1) Pull an arrow or bolt from a target and (2) turn off Lumenok Lighted Nocks. Watch the video demonstration below.
OMP XB Impact Discharge Head
With the discharge head, you can safely discharge your crossbow without the use of a discharge target.