I would order some Russian surplus ammo from J&G Sales or Aim Surplus. It is corrosive. I got some last summer from J&G. It was sealed in cans (440 rounds per can I think - but I'm not sure). It seems to work fine, and it doesn't take long to clean the rifle after shooting, so the corrosive primers aren't a big deal to me. It was kind of interesting - the ammo was clearly Russian, but the cans were in a wood crate with Nicaraguan Sandinista markings - stickers, logos, etc., so I'm guessing it came from Russia, via Nicaragua, to the U.S.
Doug