I have the TiN coated sizing die in 9mm. As a case cycles in and out of it, the TiN coated(yellow) ring moves up and down with the press, about 1mm of movement. I don't recall it doing this when new, but I could be wrong. That was about 5-6000 rounds ago, so this is not an old die... Is this something normal for these dies, or is this beginning to fail?