text: I have fired thousands of rounds of steel case 7.62x39 only had problems with one single brand. Red Army standard uses hard primers and some cases the primer pocket is too deep. The miss fires are from the hard primer being pushed into the pocket and not going off. Red Army is one brand I avoid at all cost. I do still have about 900rds left of that crap but I only use it for range practice but I do get a lot of clearing practice also. I would never trust in to be used in any situation where you are depending on it to fire.