I only reload for pistol and have no issues with plated brass in 38 spl. Like many have said, go ahead and reload nickel plated brass.
I did get the rare split the first few times I reloaded the same brass, but I guess those were the "weak" examples. Right now, I hardly get any splits.
Having said that, I recall very, very few splits in my "plain brass" brass.
FWIW, there was a magazine test that somewhat mirrored by results and most of their 38 spl brass lasted 100 reloads or more.
Sorry I cannot be more specific with the number or reload cycles, or failed cases. There are just too many cycles and too few split cases.