What is, or is there, a more reliable imported 7.62x39 ammo? I want to avoid corrosive, so I've been looking at the different Ulys, Tulammos, Bears, Wolfs, etc. Took my brand new Vz58 out Saturday to just give it a test firing, and about maybe 8-10 rounds into the first mag I had a hangfire with some just-purchased Tulammo (actually my 10 year old was shooting it when it "click-banged"). I've considered buying a spam can or two of the Uly ammo from SG, but I've read online where some people have experienced hangfires with it too, and duds, squibs, and hangfires with just about every brand of Russian import. Is that kind of thing just inherent with Russian quality control? Any opinions on which flavor is better, as far as these failures go, or are they all pretty much a crap shoot?