OK, I've never bought or used corrosive ammo. However I recently bought an AK-74 (5.45x39) and want to buy ammo in bulk. I have two choices so far. 1,080 rounds of Russian surplus corrosive for $150, or 1,000 rounds of Wolf non-corrosive for $225. While I'm not finished looking, and realize there may be better buys, it still seems that corrosive costs only about 2/3 of what non corrosive costs. Since I want to buy 5,000 rounds, the difference will add up. What to do? Thanks.