Re: Nickel vs brass
Nickel coating on brass is softer than your dies, so it ain't gonna hurt your dies. This has probabaly been said around here before, but FYI I have reloaded 1000's of nickel plated Win cases and find no difference between them and straight brass, except that the nickel may take an extra second or two when annealing them, and they seem to show a little more spring back than straight brass.
I have found no difference (significant) in case capacity, so I just reload them the same as any other same caliber case.
I actually like them because they don't tarnish as straight brass does. One of my favorite factory loads is a Win Supreme loading which comes in nickel cases, and I like them very much and reuse all the cases I fire from said ammmo. Handle like your other cases and you'll be fine.