Stacks of paper have been written about this 1930s Rheinmetall anti-tank rifle cartridge, but performance data is very inconsistent. The bullet weight is given as 12.8 - 14.6 g, the muzzle velocity as 1120 - 1275 m/sec. The projectile has a hardened steel or tungsten core with a small capsule of tear-forming chloracetophenone. The penetration is given as 30 mm of steel per 100 m at 0 degrees armour inclination. The designation Patrone 318 was a reversal of the 8/13 designation, which expressed the use of a 13 mm cartridge case for an 8 mm calibre round. The cartridge pictured has very poorly legible markings but the manufacturer can be read, which was Polte, Magdeburg, Germany in 1941. On the right is the 7.92 x 57 cartridge, photo by the author.
Source. Andersen, V. Andresen, T. Stromstad "Cartridge Cases" by own circulation, Norway 1995.
URL : https://www.valka.cz/7-92x94-Patrone-318-t126876#429602
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