I too have used Nickel Brass with no adverse affects on chipping or cracking. In fact, I have gotten over 12 reloads with Nickel Brass before I had to throw them out most likely from my over loading them as the primer pockets were loose. Here is a pic of the cases I am talking about, using them for my 22-250AI. They form nice and also never had any problems with dies scratching as I have heard about.
22-250AI on left:
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Life member NAHC, Endowment Member NRA, Member Varmint Hunters Association, F.O.P. Lodge #38
