Did Russians use corrosive primers in '97: commercial 7.62x39?

This ammo is typical lacquered jhp. My other Russian ammo, all 11,000 rds.--same chambering-- was manufactured after 2007.

The guy who traded me some loose (no boxes...) 7.62x39 from an estate sale -he's a doctor at the private shooting club- claims that primers then (1997) were no longer corrosive.

mrmeval: Thanks for the description, and read about this technique in '07 (then age 52) when first buying guns, especially MNs and LEs.

Nobody at "AKfiles" could be 'bothered' to offer any info or even an educated guess as to whether military primers could (easily) be mixed into commercial ammo--this has happened--even though many of them are Intimately familiar with all types of Russian 7.62x39 ammo.
As a precaution both the SAR-1 and MAK 90 were cleaned. This ammo will be in long-term storage with most of the other 11,000 rds., which consists of post-'07 Wolf, Tula and Monarch.

Just random trivia here, but Wolf is re-packaged in those specific brand boxes After the Russian ammo is imported into their facility in CA.