sodaksooner
WKR
That guide doesn't matter. it's a nice to have, but in the end as long as the arrow is on the launcher arm on a properly set up bow, it will fall into the groove. Not only nock pinch but make sure all your nock tensions are similar. Number your arrows and see if it is the same one or maybe a couple and look at what is different with those arrows. All that said, there is some element that points to classic nock pinch, or nock tension. I have nocks that are the exact same except for the color, and they fly differently, believe it or not. They do make nocks with different throat sizes also so make sure they are all the same from the same batch.