sentences:  The German ammunition manufacturer RWS (Rheinisch-Westfälischen Sprengstofffabrik) introduced both cartridges commercially in the spring of 1939.With the official certification of the .375 Hölderlin and the 8.5×68mm Fanzoj this German 68 mm "family" of magnum rifle cartridges that all share the same basic cartridge case got expanded in the 21st century.The cartridges in this German 68 mm cartridge "family" are, in the order of development