Quick Answer: What Do Arrow Spine Numbers Mean?

What happens if arrow spine is too stiff?

Too stiff an arrow usually just slows the bow down with a heavier arrow.

Too weak a spine arrow usually yeilds a faster lighter arrow.

But the light spine cause the arrow to shoot way off the mark as the range increases..

How do you stiffen an arrow spine?

To stiffen the dynamic spine or reaction flex of the shaft during the shot you need to remove weight up front, cut the shaft shorter, add more weight to the nock end, or lower the draw weight.

What does 500 spine mean in Arrows?

“Spine” is the measurement of the arrow’s flex or bend. Arrow shafts are sorted by spine measurements, and manufacturers designate them with a number. … Some common numbers are 350, 400, 500 and 600, but they vary by manufacturer.

What spine should my arrows be?

Use the Spine Selector to find your perfect fit. Arrow length is measured from the throat of the nock to the end of the insert. If you are shooting a longer broadhead than field point, you may want to choose a slightly stiffer shaft.

Are 340 or 400 arrows heavier?

340 arrows are stronger/stiffer/harder in “spine” than 400 arrows because they bend less. 400 arrows are stronger than 500 arrows. … A weaker arrows is “softer”. Generally 600 arrows are for bows from 15–35 pounds in draw weight, 500 for 35–55 pounds, 400 for 55–75 pounds, and 340 for 75–95 pounds.

What is a 340 spine arrow?

Easton’s familiar carbon arrow spine sizing system (500, 400, 340, 300) is basically the arrow’s spine deflection x1000. So a 500 shaft is a . 500″ deflection. A 340 Easton shaft is a . 340″ deflection and so on.

Are Heavier arrows more accurate?

All factors remaining equal, heavy arrows always are more reliable, more durable, than lighter. … Cons: Heavy arrows are undeniably slower than lighter ones when shot from an identical bow.

Is an arrow as deadly as a bullet?

An arrow is as deadly as a bullet, so the basic safety rules that govern firearm shooting also apply to archery. Although shooting accidents are rare among bowhunters, they do happen. Archers must obey a few common safety rules, whether on the range or in the field.

What is arrow spine deflection?

Arrow spine is a measure of stiffness which is gauged by how much the arrow flexes when weight is applied. … For example, if an arrow bends one-half of an inch at the center, then the shaft has a static spine deflection of . 500”.

How do I know if my arrow spine is too stiff?

A lighter tip INCREASES an arrow’s spine (makes it act more stiff). If the arrow is too stiff it will favor the left side while if the arrow is a bit weak, it favors the right side.

How long should my arrows be for a 29 inch draw?

Static spine To calculate this, arrows must be 29” long and supported at two points 28” apart. The number of inches the arrow bends multiplied by 1,000 is the arrow’s spine. So, an arrow numbered 350, bends . 350” when the weight is applied.

Why are my arrows fishtailing?

Often only a slightly suspect loose of the arrow can cause considerable fishtailing. … A clean shelf with a scuff mark left by a vane hitting it is a clear sign of a “clearance problem.” Clearance problems stem from nocking point height, centershot (arrow rest) misplacement, and arrow spine issues.

What does 400 mean on an arrow?

The most common spine sizes range from 260 to 500. As with combination arrows, a smaller number means the arrow has a stiffer spine. Therefore, a value of 340 indicates a stiffer and heavier spine while a value of 500 indicates the lightest and most flexible spine.

What happens if an arrow is too short for the bow?

Bending, known as “archer’s paradox,” occurs when an arrow is released from the bow. … Spine strength must be matched to bow draw weight. If your arrows are too lightly or heavily spined for your bow, the “archer’s paradox” movements will be extreme, resulting in poor arrow flight and loss of accuracy.