Kynoch 9mm rifle cartridges


I am going through a bunch of Kynoch 9mm Mauser cartridges and noticed half them are Headstamped 9mmM and half 9mmM.S. Did they use the same case for the Mauser and Mannlicher? I can’t find any difference. Thanks;Jack


There’s a little difference but the two are not interchangeable .You will note the slightly different shape between the two rounds ( and they both headspace on the shoulder)