Norma 8x57 JS 196gr Whitetail SP 20 PackThe 8mm Mauser was adopted by the German army in 1888 and in the following years by a number of countries like Czechoslovakia. Poland and China. The designation Mauser is actually a misnomer as the cartridge was developed by a German military commission at Spandau Arsenal for a forerunner of the famous Mauser rifle which was adopted in 1898. The J in the name stands for Infanterie. The J designation is due to a mistake deriving from the previous use