Ive french tuned and walk back tuned the snot out of this bow. I still have major porpoising at 20 yards and beyond. Sort of looks like a combination of fish tailing and porpoising. Anyway, Ive shot GT 5575s with 4 inch feathers and blazers, Victory HV400s with 4 inch feathers and Axis 400s with 4 inch feathers, all of them have the problem. Draw weight is 60 lbs, 27.5 draw, 28 inch arrow
What do you think, spine incorrect or nock height?
Any ideas welcome.
Thanks
