Vertical Spine-Bareshafts

[ewolf]

Something new for me today. A new "tester bow" spine problems. The bare shafts were hitting perfect, so me being me i took off the 125 points and put on 100s (to see how much more energy it would take to shot 100s). Bare shaft now is hitting high at 20 yards. Put the 125s on and they go back down. Put 85s on and they go even higher. Anyone every had this happen to them? Its a first for me. Vertical Spine with bare shafts.

[AK]

This actually falls right in line with something I've noticed time and time again. That being, stiffer shafts need to be nocked lower than weaker shafts. When you switched to lighter points, the shaft behaved as if it was more stiff and came off the bow nock high. Keeping the same nocking point, if you threw some 145 grn points on there, I'd bet the shaft would be slightly weak (perhaps tail left) and nock low.