2 different cases here (pun intended)
You mentioned nickel cases--these are nickel plated brass, and they don't have as long a reloading life as non-plated brass but they reload just fine until their necks crack, then you scrap 'em.
You also mentioned Wolf cases--these IMX are steel, not brass, and some are Berdan primed. Steel is an extra hassle to reload; get some nice brass cases and be done with it. Berdan primed cases are a PITA to reload; get some nice brass Boxer-primed cases and be done with it. (Boxer primed cases are the ones with a single large flash hole. Berdans have 2 off-center small holes.)
Notice I didn't say either one was impossible to reload. I have friends who insist on doing everything the hard way, just because. I tolerate their wierd ways, but I sure don't imitate them!