When WOlf first came out with Carbine ammo I bought 500 rounds cheap. I fired one box. Out of my otherwise tight shooting weapon, the groups were dismal. Way different POA even at 25 yards. Inconsistent ejection, and inconsistent bangs. Smelled of ammonia. When I took it apart, it was very dirty...and when I detail stripped the bolt because it was so dirty, I had a chipped extractor lip. Still serviceable, but damaged. I soild 450 rounds on GB cheap... I use steel case in my AK, but that's it!