Had a table at the local gunshow this weekend. The guy next to me saw my Steyr 1900 and said that he had some ammo for it. He brought it in today. 210 rounds all packed in cardboard packets of 15 rounds on 3 stripper clips. At first I figured that it would be corrosive berdan primed but after seeing the "keep away from children" warning it might be newer than I at first thought. Headstamped with 50 F and N. Any knowledge? Sorry for the large photos.