I bought a bag of 50 Winchester Nickel Plated in 7mm Rem Mag a few years back, and I will never load it again, at least in 7mm. The necks were very tight, even after resizing necks/chamferfing/etc it would still peel a layer off my bullets.

I have been tossing around the idea to try a bag of it for my 243 and see what happens, but am still kinda leary after my initial experience.