Hi, perhaps someone can unravel this. Compound bow set at 45lbs, 32" long 550 spine Skylon Paragon arrows with 120gr points. 3 x fletched arrows and 2 x bare shaft arrows. Paper tuning gives bullet holes. Bare shaft tuning the arrows land together at 10m. At 20m the bare shafts land well left of the fletched arrows, at 30m the bare shafts miss the target to the left. Fletched arrows all landing accurately. Bare shafts landing left means the spine too stiff as per Easton tuning manual. OK, using John Dudley's mantra of tuning the bow to the arrows I increased the poundage by half a turn until it has been increased by 2.5 turns on the limbs. Still landing well left. It appears the fishtailing is increasing although one would have thought that they would land left and right if it was that much. So I backed off the poundage by the 2.5 turns and then another half a turn - same result. Can't really back off that much more as not enough thread left if I do. The Skylon spine chart suggests 550 at 31" for 40-45 lbs compound bows. So, any ideas ? Thanks