Hmmm, interesting. I hadn't watched the video, but I just did. Sounds like maybe I've wasted a lot of money on neck sizing dies over the years, plus the whole extra trouble of additional dies, additional sorting, etc. I always thought the best accuracy came from the best fit, which came from forming the brass to that particular chamber and only resizing the neck to hold the bullet. For most of my calibers, I have a FL sizing set, plus a neck die. I can't disagree with 100% of the country's best shooters, though. Old dogs CAN learn new tricks.