This may be the same stuff I bought. Does it have a very distinct ammonia smell when fired? If it is the same stuff, it would not cycle my HK33, My C93 (hk clone) or 2 of the ar's. It was way under powered. It would cycle AK's and the daewoo. I was trying to find an acceptably accurate ammo thawould function all my 223/ 556 weapons. This was not it.