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    6.5mm Bergmann

    Topic: Engineering

     From Handwiki - Reading time: 1 min
    Short description: German centerfire pistol cartridge
    6.5mm Bergmann
    Bergmann model 1896 in 6.5 caliber
    TypePistol
    Place of originGerman Empire
    Production history
    DesignerBergmann
    Produced1895
    Specifications
    Case typesemi-rimmed
    Bullet diameter.26 in (6.6 mm)
    Neck diameter.285 in (7.2 mm)
    Shoulder diameter.330 in (8.4 mm)
    Base diameter.368 in (9.3 mm)
    Rim diameter.372 in (9.4 mm)
    Case length.870 in (22.1 mm)
    Overall length1.230 in (31.2 mm)
    Ballistic performance
    Bullet mass/type Velocity Energy
    76 gr (5 g) FMJ 710 ft/s (220 m/s) 84 ft⋅lbf (114 J)
    Source(s): "Textbook of Automatic Pistols" [1]

    The 6.5mm Bergmann is an unusual centerfire cartridge produced for very early self-loading pocket pistols.

    Design

    The case is bottle-necked and steeply conical, and headspaces on the conical case walls. Early versions were made without any rim or extraction groove; and relied upon blow-back for expulsion of the fired case from the chamber. Later Bergmann pistols provided an extractor requiring a groove which produced a semi-rimmed case.[1]

    See also

    • Theodor Bergmann
    • Bergmann 1896

    References

    1. ↑ 1.0 1.1 *Wilson, R. K. Textbook of Automatic Pistols, pp.256-258. Plantersville, SC: Small Arms Technical Publishing Company, 1943.




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