RE: Winchester premium nickle-brass?
well.......
I' ve reloaded a set on the nickel Win brass I amassed from shooting the Premium Silvertip Ammo about 10 times now.........And it is still holding up. I have retired several of the cases because the primer pockets got too loose - but other than that, all is well - no sign of impending case separation nor has the plating started to flake yet.
BTW......... these are .308Win cases fired in semi-auto rifles, full-length resized everytime, and annealed after every 3rd loading. Most of this was used for hunting load development, so the loadouts were light to moderate for the most part.
One other thing - my cases were VERY light compared to most other brass, so you may have to adjust your powder level accordingly.