Found an empty casing and a live round with the same headstamp at the range today. Unusual to find surplus military 9x19mm around here. Headstamp is a “K” at 6 o’clock, “5” at 9 o’clock and “0” at 3 o’clock. There are 4 double lines (like || ) seperating the headstamp elements, forming an “x” across the head. The quadrant of the head at 12 o’clock is void of any letter, number or symbol. I think this is 1950 vintage Swedish (K= Karlsborg?). The live cartridge is a FMJ with black case mouth seal and primer anullus. Shouldn’t there be a crown or something at 12 o’clock? Is this common shooter-grade surplus here in the US now or a while ago? Or did someone shoot up some collector ammunition?