I shoot Federal brass for both my 7 Mag & STW. Fixin to pick up some Nosler STW brass from my local store that has 1 box in stock. I'll let you know how they do once I get them. All my Federal brass has been saved up from over the years of shooting factory loads so they are all fire-formed to my guns. My .257 Wby uses Norma/Weatherby brass from factory loaded Weatherby brand ammo. And I use Lapua for my .308's. I wish I could find some Lapua STW brass, but I don't think they've ever made any...