What arrow spine is right for my compound?

I have been contacted by 3 different people in the last 24 hours with respect to arrows and spine.

So lets go through this:

“How do you choose the right spine to shoot out of a compound?”

There is one proviso that must be accepted:

First:

Choose a point weight, for many this will be a personal choice between 100 and 120 grains, lets choose 120.

Second:

Work out the heaviest weight of arrow that includes this point weight and will give you adequate performance for what you are looking to do.

So in target archery that is a minimum speed of 230fps for female seniors, and 265fps for gents seniors.

This figure can be worked out using a computer program such as Archers advantage or just through experimentation with different weight arrows through a speed gun.

Third:

Take this total arrow weight and look at the various spines of carbon and carbon aluminum arrows that this will equate to. These are all the arrows that will perform best for your set up as they are the stiffest arrow that you can get away with shooting with respect to the point weight you want to shoot and the arrow speed you require. If you then set the bow up with the rest going through the middle of the string with respect to a centre line on the bow the arrows will tune (paper tune, bare shaft whatever method you choose).

If they appear not to then you are torquing the bow, and this can be explained in a multitude of ways in a later blog.