I use nickel cases also, as long as I make sure to spray them with case lube I don't worry about any thing else with them.
I just don't want nickel galding to the carbide ring in my dies. Case lube stops that. I've loaded thousands of them. Mostly because I'm usually the only one at the range that is loading them so I can pick out my cases among all the brass ones, very easily. I don't like getting home from the range and finding out I have a whole bunch of brass with crimped primer pockets that I now have to deal with.
I'd sooner have my own brass back.