Spine Calculator

[Jake Leibke]

Wondering if anyone has a program to calculate proper spine. I am shooting a hoyt alpha burner 70# 29.5" draw 27.5" arrow 125 grain head. Shooting victory vap with the penetrator 2 insert which weighs 50 grains. wondering if the 350 spine in good or if i need to go with the 300. Now I have 350 and seem to keep getting a tear high on paper no matter what I move.....

 

[PhillyB]

There are about 15 choices for VAP arrows. Can you be more specific on your arrow?

In just running some of the VAP arrows, everything is pointing to the .300 spine.

If you havent downloaded it before, the pinwheel software gives you a 10 day free trial

 

[Jake Leibke]

I have the 350's now.... I will try the pinwheel software thanks