Also: Patrone SmK (Spitzgeschoss mit Kern) 8×57mm IS
The K bullet is a 7.92×57mm (8×57mm IS) armor-piercing bullet with a tool steel core designed to be fired from a standard Mauser rifle. It was used by the German infantry against the first British tanks in World War I and on the Panzerkampfwagen I. On average the K bullet has a one out of three chance to penetrate armor 12–13 mm thick at a range of up to 100 meters.
|S.m.K.||Spitzgeschoss mit Kern|| Standard steel core armour piercing bullet.|
It had a red rim around the primer, on case base.
|S.m.K.H.||Spitzgeschoss mit Kern, Hart|| Replaced the tool steel core with a tungsten carbide core.|
It had a red case base including primer, from 1939: red primer only.
|S.m.K. L'spur||Spitzgeschoss mit Kern, Leuchtspur|| Has a shorter steel core, and includes a tracer composition. May include color designation such as gelb, German for "yellow".|
It had a red rim around primer and black bullet tip.
|S.m.K. Ub.m.Zerl.||Spitzgeschoss mit Kern Übungsmunition mit Zerleger||A very rare practice bullet which self-destructs after a certain distance.|
- Fletcher, D British Mark IV tank Osprey Publishing p14
- Dąbrowski, Jarosław. Amunicja małokalibrowa kampanii wrześniowej in: "Strzał" 10/2010, pp. 18-24 (in Polish)
- K98k Mauser Page