the Yugo M67 from samco global can be ordered on stripper clips for about a penny a round more. Its my favorite 7.62x39, It's the most accurate, most consistant, best construction and materials (all copper brass and lead, no steel jackets or cases), and it comes in air tight zinc lined sealed wooden crates. The corrosive deal is nothing special or new to me, with every bit of 7.62x54r, 8mm Mauser, 5.45x39,7.62x45 and most all of my 7.62x39 being corrosive. I just clean with hoppes #9 and nothing else and have never had any rust on anything of mine. I dont store for years at the time though, everything gets shot and recleaned at least every few months and stored indoors. i clean with hoppes when i get home from the range and have never seen any rust unless i didnt feal like cleaning a gas tube till the next time i went shooting a few days later, then i have seen gas tubes with red fuzz starting to show.
correction: i get the Yugo7.62x39 for 21.9 cents/round on strippers, 19.9 cents/round loose in the 15 round paper boxes.