This topic is fascinating with a wide range of views from huntnshoot claiming you can neck size forever without bumping the shoulder back and pete53 claiming you are a fool if you don't Full length size every time..... I watched the video and was glad to see Lou Murdica on it, haven't shot with him in a year or two. One thing most don't understand is that most competitors in any shooting discipline use custom actions and shoot hot loads above saami specs. I know from shooting benchrest that you have to full length size because you wouldn't get the case back in the chamber just neck sizing (not even using huntnshoot's methods). On the other hand I have a few varmint rifles 222,223 and 204 that I use a Lee collet neck sizing die for several shots before setting the shoulder back, no absolutes one way or the other but common sense goes a long way
