I'll have to check some of my Wolf and Barnaul. Both are current production. I could swear they said it was copper plated steel (bi-metal) jackets with lead core. There was also a video that tested expansion of current production 7.62x39 Wolf and Golden Tiger hollow point ammo. It didn't really expand, they said, because the bi-metal steel jackets were too hard to allow for the same level of expansion as copper jackets. Wish I could find that video again.I don't think there was anybody making new production ammo using steel cased projectiles, at least not for import to the US. Palmetto may use steel core projectiles but I would really doubt the tried to cheap out and use a steel jacketed bullet.