Oh, by the way, I have never scratched a die with nickle-plated cases. I make sure that they are spiffy clean and run the necks through a Redding Type-S Neck Sizing Die that is fitted with a .243" titanium nitride (TiN) bushing.
No damage to either case nor die.
My .280 Ackley cases are also Winchester nickle-plated; mostly I neck size, using Redding Type-S dies, but occasionally I use the Redding Body Die for easire chambering. Again, no problems experienced.
Steve Timm