PPU is very very short in my M70 chamber , so I wouldn’t invest much time in first time around loads. Fire form then full length size, only pushing the shoulder back .002 ish. Nosler brass is manufactured by Norma, and then marked up. If I were you I’d buy factory ammo and shoot that to get used to the rifle, say 20-40 rounds and then just reload that brass. It will be formed to your chamber and you get to practice, both a win. Barnes factory loads are good enough to hunt with and is available everywhere, and the brass is good quality. Hornady factory brass is also good.