My experience is about the same as Georges. Except I had problems with the yellow ones. Probably bought about the same time. Before that, Mercury nocks were by far my favorite.
The problem I had with the yellow nocks was almost as if the hole was off center. Since the hole is actually a cone shape, the nock ended up with the wall on one side being much thinner than the rest of it and usually the bottom edge was not flat on that same side. You could spot them at a glance by looking for a dip in the edge on one side. The thin wall did cause them to split when you pushed them on especially if using Duco Cement as it actually melts into the plastic a bit.
FYI, I've had pretty good luck removing glued on nocks by holding the shaft near the nock with a pair of rubber coated spark plug pliers and using regular pliers to twist and pull the nock off. Worked best on nocks that hadn't been on for a long time and the amount of paint or clear on the arrow can make a difference too. Sometimes you have to cut them off or risk damaging the shaft.
If your arrows look ok, I wouldn't worry about them at all. In fact, the odds are good that you DON'T have bad nocks as they most likely would have been noticed by whoever built the arrows. Even if they were crooked, I doubt they'd be a danger. More of a tuning issue because of not being aligned with the arrow shaft.
Topic: Mecury nocks (Read 279 times)
