One exception - Barnaul. Avoid the green coated steel stuff, unless you're super hard core about practising stoppage drills. I tried to run some in a brand new G17 and it choked repeatedly, tried it in a G19 and my always reliable M&P, it choked in all of them. I kept the stuff because I could feed it into random mags and it would fail on an unpredictable schedule. Great for that type of practise, but otherwise utterly useless. I think the primers were cast iron.