Guys I just got a new batch of carbon arrows that are the exact same model spine fletching style length gpi etc one batch I bought 2 years ago the other is new and if I go out and shoot my gaps with the new arrows are different. They tend to shoot 3-4 inches higher than the old arrows of the exact same spec. Strangely they both seem to bareshaft fine on the bow but it's basically that my point on has gotten a few yards farther with the new batch even though all things are exactly the same. Any thoughts? Have you seen that where there is that kind of variation in a carbon shaft of the same make and model?