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  1. Copilot Answer
    Wikipedia
    https://en.wikipedia.org/wiki/9×21mm
    9×21mm - Wikipedia
    TypePistol
    Place of originItaly · Israel
    DesignerFranco Benvenuti Agency (Italy) and Israel Military Industries (IMI)
    Produced1980–present
    About SR-1 Vector SpetsNaz Pistol with powerful 9x21mm cartridge
    04:09
    About SR-1 Vector SpetsNaz Pistol with powerful 9x21mm cartridge
    YouTubeEDGE of Reality85.8K viewsMay 28, 2018
    Overview

    The 9×21mm pistol cartridge (also known as the 9×21mm GP, 9×21mm IMI, 9mm IMI, 9×21mm Italian, or 9mm Italian) was designed by Jager (Loano, Italy), then adopted and commercialised by Israel Military Ind… See more

    History

    Based on the 9×19mm Parabellum cartridge, the case was lengthened from 19.05 to 21.15 mm (0.750 to 0.833 in). The bullet sits slightly deeper in the case, which results in almost the same overall length as the 9×19m… See more

    Cartridge dimensions

    The 9×21mm has 1.01 ml (15.5 grains H2O) cartridge case capacity.
    9×21mm maximum C.I.P. cartridge dimensions All sizes in millimeters (mm).
    The common rifling twist rate for this cartridge is … See more

    Wikipedia text under CC-BY-SA license
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