I am just starting to try to squeeze as much accuracy out of my 7mm rem mag as I possibly can. So far I have been testing loads with new brass (Norma and Nosler) and I have found a couple of recipes that I am getting great groups with. But now it is time to size my once fired brass and I am trying to narrow down the best sizing methods. I have both the Redding competition FL die and the Redding competition neck sizing die for it, but I keep reading about the Larry Willis collet dies. Do they FL size the case? I keep reading that if I want to get maximum accuracy I want to just neck size the brass so that I am headspacing off the shoulder instead of the belt. (Please excuse me for sounding like a nube) So should I use my neck sizing die until I have chambering issues then FL size them? Or should I just order the Collet dies and stick with that?