Hi chaps, I need to ask how to find the correct arrow for hunting game up to Oryx sized animals.
My bow is a 55 pound compound bow, my draw length is 29 inches. I have bought some Easton Gamegetter. XX75 with a 300 spine. However they are 32 inches in length. Are they too long?
thanks for any input as I am still learning.
MarkCZ
Hi Mark,
So, a spine chart recommendation is a general starting point.... If you are using Easton's spine chart for your reference it should get you close. The link that 375 Ruger Fan posted also contains a lot of useful information that will help you understand the importance of having the right spine... However, there are many factors besides spine that will influence the arrow's flight including total arrow weight, the percentage of weight forward distribution, and even the style of broadhead that you select...
Without getting too technical, you can shoot your bare arrow shaft including a field tip (at the same weight you intend to use for your broadhead) through paper from about 6-8 feet away. The tear pattern you see on the paper will show you the flight of your arrow shaft as it leaves the bow... You make your tuning adjustments based off of those tear patterns. The goal is to make fine adjustments until you are shooting bullet holes. Bullet holes means that you are shooting a near perfect arrow that is properly spined. An arrow that is not of the correct spine is often coming out of the bow on tilt or at yaw regardless of the rest adjustments.... This is often visualized by seeing the arrow "fish-tail" or "barrel roll" in flight. When your bow/arrow is out of tune, you loose valuable energy which can translate into poor accuracy and lack of penetration. However, shooting tight groups does not necessarily mean that your bow is tuned well. You can still shoot an arrow in the same place repeatedly even if it is way out of tune to the bow. Too many beginner bow hunters assume good groups are reflective of proper tune. You would be shocked to see how many "professional" bow hunters are shooting a bow that is out of tune. The slow-motion shots portrayed on these hunting shows often show an arrow flying nearly sideways before impacting the animal. They are likely loosing up to 50% of that arrow's momentum because of that poor tune....
Adjusting your arrow rest will correct arrow flight if you are at or near the proper spine. If your arrow is not of the correct spine, you will not be able to tune properly regardless of rest adjustments. You can shorten the arrow length to stiffen the spine, and you can also adjust the draw weight to catch up to the spine, but these are micro-adjustments. For major flight issues that you can visually see from the arrow flight, you will likely need to go up or down to the next spine classification.
For a beginner, it can seem a bit technical, but it's good to learn in case you are a thousand miles away from a bow shop and find your bow is out of tune... If possible, I would find a reputable bow shop with a qualified technician to help select your arrows and tune your arrows to the bow... Watch what he/she does, and ask them to explain what they are doing and why.... And, if all else fails, YouTube has a thousand videos on the subject. One of the better ones is linked below. Good luck and have fun with it...!