I had a half dozen of fletched arrows that had never been shot that I decided to shoot today. So I screwed a BH on and started shooting just to make sure they all flew correctly.

Anyway, one of those arrows would curve to the right in flight. Almost similar to a curve ball. All the vanes appeared to be intact and the arrow didn't seem to have a wobble when spin-tested. Keep in mind, I was using the same broadhead on each arrow. What else could have caused this?

BTW (not that it matters): Before I installed the inserts, I floated each of these arrows to find the stiff side of the shaft and I shoot that side down.