Proper arrow spine is what proper arrow spine does.

The correct spine arrow for the bow will hit the same vertical line at all distances when the bow is in tune. Too light of a spine arrow may hit the same spot at 15yards all day long, but when the range increases the arrow will impact more and more to the left as the range increases.

You could back the poundage down on your bow to try and find a draw weight where your arrow spine will work. I'd say between 50 and 55 pounds you would be about right.

I'd keep the bow at an even tiller and back both limb bolts out the same number of turns each. And I'd nock the arrow at 90degrees to the bowstring.

The windage for the rest should be determined by grouptuning at 10-20-30-40yards. When tha arrows all hit the same vertical line at all distances the windage is set right.

Good luck hunting! >>>------------>