I had my recurve at the range yesterday doing some long range shooting with some year-old GoldTips. Our targets have metal frames (I think they were donated by the local archery shop to increase his arrow sales) and I clinked two arrows into the frame. Both got the insert and point driven up the shaft. Both nocks popped out. One snapped in half close to the fletching. But none of that was unexpected on that kind of hit.

What puzzled me is both arrows had spirals of carbon coming out of the nock end of the shaft. I can't figure out what could have caused that. Why did they unravel?

Arrows in question are Gold Tip Hunters, 7595, 32" long, feather fletched using Bohning fletching tape (no solvents used), shot from a 55 pound recurve at 125 yards.