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  2. Overbore - Wikipedia

    en.wikipedia.org/wiki/Overbore

    As the ratio is expressed in units of length, relatively high O ratio is a good predictor of suitability for relatively long barreled guns. O ratio is also used to predict barrel life in cartridges of the same caliber, but not of different calibres, since the ratio is an extensive quantity that does not correlate to temperature or pressure (e.g ...

  3. 9mm Major - Wikipedia

    en.wikipedia.org/wiki/9mm_Major

    9mm Major is a wildcat cartridge of the 9mm Luger specifically for competition pistols designed to handle very high pressure. It is used in practical shooting competitions like International Practical Shooting Confederation (IPSC) and United States Practical Shooting Association (USPSA) to achieve a "Major" power factor, which earns more points for hits in specific zones on paper targets ...

  4. Hi-Point C-9 - Wikipedia

    en.wikipedia.org/wiki/Hi-Point_C-9

    Another difference between the C-9 and C-9 Comp. is the barrel length. Its 4 in (102 mm) barrel is 1 ⁄ 2 in (12.7 mm) longer than its sister weapon's providing for better accuracy and balance. The compensator and extra bulk also increase the weight.

  5. 9 mm caliber - Wikipedia

    en.wikipedia.org/wiki/9_mm_caliber

    This is a list of firearm cartridges that have bullets in the 9 millimeters (0.35 in) to 9.99 millimeters (0.393 in) caliber range.. Case length refers to the round case length.

  6. Small arms ammunition pressure testing - Wikipedia

    en.wikipedia.org/wiki/Small_arms_ammunition...

    C.I.P. uses a drilled case to expose the pressure transducer directly to propellant gases. The piezo measuring device (transducer) is positioned at a distance of 25 millimetres (0.98 in) from the breech face when the length of the cartridge case permits that, including limits.

  7. Table of handgun and rifle cartridges - Wikipedia

    en.wikipedia.org/wiki/Table_of_handgun_and_rifle...

    This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load (e.g. the highest muzzle energy might not be in the same load as the highest muzzle velocity, since the bullet weights can differ between loads).

  8. Power factor (shooting sports) - Wikipedia

    en.wikipedia.org/wiki/Power_factor_(shooting_sports)

    In the classic division a choice can be made between up to a 10-shot capacity 1911 with minor scoring (e.g. 9×19mm) or up to an eight-shot capacity 1911 with major scoring (e.g. .40 S&W or .45 ACP). In the revolver division major scoring can be achieved with a 9 mm bullet diameter, but with a power factor of 170.

  9. 9×19mm Parabellum - Wikipedia

    en.wikipedia.org/wiki/9×19mm_Parabellum

    The 9×19mm Parabellum (also known as 9mm Luger, 9mm NATO or simply 9mm) is a rimless, centerfire, tapered firearms cartridge. Originally designed by Austrian firearm designer Georg Luger in 1901, [ 6 ] it is widely considered the most popular handgun and submachine gun cartridge due to its low cost, adequate stopping power and extensive ...