I have shot many thousands of rounds of Wolf 5.56 steel cased ammo. Its about half inch less accurate at 100 yards and noticeably under powered compared to Lake City M855 or other brass cased mil surp ammo. With that said I am still able to score 300 yards hits with it, and I even use it for practical/tactical competitions as its cheaper. For practice and for those types of competitions its certainly good enough. It's much dirtier too and the rifle needs lots of cleaning afterwards. It's not been dirty enough to induce failure though.