I think I just trashed a Lee carbide sizing die tonight by resizing one, yes one nickel plated 9mm case. I just don't like the way the next 50 cases looked like someone used steel wool on one side of the brass cases.
I might add that there was
No flaking of the plating.
I will never pick up another nickel plated case again. Just not worth it even if they do look purty.
I resized .40 S&W and .45acp nickel plated cases for poops and grins with no issues.
Edited to add:
I took the decapping pin out and cleaned with some Hoppes and a properly sized brass bore brush followed by a similar sized bore swab. Almost all gauling is gone. If it doesn't go away entirely when I am resizing my next 9mm brass I will take it apart and clean it again.