I have a longbow, that no matter what I do, it shoots nock hight as verified thru paper and bare shaft. The 1 piece is even tiller between the top and bottom limbs. I shoot split fingered. I don't believe form is an issue since my other bows shoot fine and like bullets bare shaft. I've tried putting more emphasis on the lower 2 fingers, hoping that would help... but, doesn't. My grip is the same with all bows as far as I can tell. Any ideas? thanks