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The .41 Swiss (officially the 10.4x38mm R Swiss Vetterli M69/81) is a .415 in (10.54 mm) Swiss military rimfire rifle cartridge. In 1867, the Swiss military adopted the 10.4×38mm cartridge. As one of the few rimfire cartridges to see military service, the 313 grain bullet and 1,400 fps muzzle velocity was respectable compared to its contemporaries. The most popular arms chambered for this round were the Vetterli series of rifles.