Nickel coated brass.

[gumpokc]

I'll chime in too.

The only nickel brass I've used is 8mm mauser, and .38spl/.357mag.

the .38/.357 i have used several times, I got it on a midway special, similar to Adam's, but i think I got mine about 7 years ago, roughly '99-2000 timeframe.

I've had no problems, as expected with the straightwalls, but the 8mm really puts them through the wringer.
Add to the fact that until last year the 8mm I was firing them through was a Hakim, and you can see they didnt last long.

If you had to load them, and have them handy in all weather conditions, for any length of time in belts or otherwise exposed, I think they'd be just fine.

just my .02