Quick Answer
A stiff arrow spine indicates a higher chance of deflection, while a weak spine suggests a loss in kinetic energy and potential loss of accuracy due to inconsistent flight.
Assessing Arrow Spine
To determine if your arrow spine is too stiff or too weak, consider the following factors: arrow weight, draw weight, and arrow material. A general rule of thumb is to use arrows with a spine weight ranging between 300 and 400, assuming a 28-inch draw length. However, this can vary depending on the individual’s build and the type of hunting being done.
Checking Arrow Spine Flex
One method to check arrow spine flex is by using a spine test kit, which usually consists of a series of metal or plastic rods. Hold the arrow vertically and gently push it against the rods, checking for any deflection or wobbling. The arrow should flex slightly but return to its original position, indicating a suitable spine weight.
Balancing Arrow Weight and Spine
When adjusting arrow spine weight, it’s essential to balance it with the arrow’s overall weight and the hunter’s draw weight. Aim for a total arrow weight of around 400-500 grains for a 28-inch draw length. This balance will help prevent arrow deflection and ensure consistent flight patterns.
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