I bought a couple of cases of these 120 round packs back in the 1980s (maybe the 1990s), and I have about five of the 120 round packs left. I haven't shot any of my 7.62x39 rifles in many years, but have been thinking of shooting some of them and, searching for ammo, I found these in the back of my ammo cabinet. Each box says it's non-corrosive. Is this reliable labeling?

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