Depending on the dates on the headstamp, it may be corrosive. Typically, if it is 70's dated and earlier, it's probably corrosive, however, the packaging will also lend to whether it's corrosive or not. Most that I've seen in 20 round boxes for commercial sale have been non-corrosive, while those that are in the 30 round paper wrapped stripper clips are usually corrosive.
Just remember that this is only "steel core", and not AP ammo. It's good, reasonably accurate ammo, and a little on the hot side, compared to basic Russian stuff. And, if you found 920 rounds for $250, that's pretty decent considering the price of Wolf and others these days. Good score, IMHO.