 The 9.5×57mm MS is also known as the 9.5×56mm MS, the 9.5×56.7mm MS, and the .375 Rimless Nitro Express (RNE) × 2¼ (primarily in England).The cartridge may have been created by Westley-Richards and Eley in 1908 (rather than by the Oestereichischer Waffenfabrik-Gessellschaft, Steyr (OWS) (Austrian Arms Manufacturer-Association, Steyr)), but no production rifles in this caliber have been found prior to the M-1910.This development by or on behalf of Steyr was probably an answer to the development by the noted British gunmaking firm of Holland & Holland in 1905 of their .400/375 Belted Nitro Express, designed for their specially modified Mannlicher–Schoenauer rifle (they imported the actions from Austria, but built the rifles in house).