Can safely say it is not normal wear. Does it seem to be a bend in the rod, or more like the end possibly pulling loose? i.e. is there a point before the end cap that seems bent/worn, or just that the end cap is uneaven? either way, I would contact Ruger, but I would go to them with a more detailed description of the issue. My concern is that a fault might be working the end cap off, and that it could fly off during firing.