So I was just flinging a few arrows in my basement before packing up the bow for a 3D shoot tomorrow when I let one fly and hear a "CRACK". The arrow hits wide left and low of my aiming point and I hear a piece of something dancing across the basement floor. I immediately think something happened with the bow but it checks out fine. Limbs are good and the cams show no evidence of having bent. I look at the arrow in the target and see the nock is broken and I the found the missing piece. I shot a few more arrows and the bow seems fine.
I have been shooting these same arrows over and over and over. I've never had this happen before but with the amount of stress put on these arrows, I can see how it would happen. Could have just been a weak nock.