Yeah, my reloading dies are just absolutely ruined...
From all the internal scratches done by the thousands of pieces of nickel-plated rifle and pistol brass that I've reloaded over the last 25+ years.
It's really much ado about nothing. Nickel brass is just fine. It doesn't trim well, because it doesn't cut cleanly in certain case-trimming tools. My Lee case trimmer snags a little when cutting it, but it's no big deal to me, because I only use a handful of .308 and .30-06 nickel brass from the bottleneck family. My straight-wall .38, .357, 9mm, .45 ACP, and .45-70 nickel brass never gets trimmed, so it's a moot point.
Likewise, if the stuff was so hard, it wouldn't resize worth sour owl poop in reloading dies, nor would the brass seal effectively in a given firearm's chamber during peak pressures. Cartridge brass has to expand a smidgen, then spring back to something closer to nominal dimensions to effectively function in a firearm, nickel-plated or otherwise.
I've had older pieces of nickel-plated cartridge brass flake tiny pieces of nickel off. I suspect that's more of a plating problem than anything else, because other pieces of the same style of brass actually wear the nickel away, leaving a silver/gold looking combination after many, many reloadings.
I'll take all the nickel brass intended for somebody who has religious objections to them. I'd be quite happy to relieve them of said burden to their conscience.
I've discovered that quoting some website doesn't substitute for actually having been there and done that. I've caught many online "experts" in error, and actually had a few change their stories when confronted about it...
It's kind of like Wikipedia, in that respect. Anybody who's read Chuck Hawks knows what I mean.
