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  2. 4.5×26mm MKR - Wikipedia

    en.wikipedia.org/wiki/4.5×26mm_MKR

    4.63 mm, 22 mm long, cold-rolled copper, boat-tail spitzer. Neck diameter: 5.02 mm: Shoulder diameter: Shoulderless: Base diameter: 6.48 mm: Rim diameter: 7.44 mm: Case length: 26.10 mm: Overall length: 42 mm overall length: Primer type: Rimfire: Filling: 0.51 grams tubular nitrocellulose powder or 0.57 grams spherical double-base powder ...

  3. Traditional point-size names - Wikipedia

    en.wikipedia.org/wiki/Traditional_point-size_names

    (11) Diamond (4.5 pt, 1.5875 mm). Fonts originally consisted of a set of moveable type letterpunches purchased from a type foundry . As early as 1600, the sizes of these types—their "bodies" [ 1 ] —acquired traditional names in English, French, German, and Dutch, usually from their principal early uses. [ 2 ]

  4. Rimfire ammunition - Wikipedia

    en.wikipedia.org/wiki/Rimfire_ammunition

    The next rimfire cartridge was the .22 Short, developed for Smith & Wesson's first revolver, in 1857; it used a longer rimfire case and 4 gr (0.26 g) of black powder to fire a conical bullet. According to Berkeley R. Lewis, a firearms historian, this later Smith & Wesson cartridge was 'essentially the same as Houllier's 1846 patent'. [ 11 ]

  5. 4 mm caliber - Wikipedia

    en.wikipedia.org/wiki/4_mm_caliber

    5 mm» This is a list of firearm cartridges which have bullets in the 4 millimetres (0.16 in) to 4.99 millimetres (0.196 in) caliber range. All measurements are in mm (in).

  6. Cartridge (firearms) - Wikipedia

    en.wikipedia.org/wiki/Cartridge_(firearms)

    The second number reflects case length (in inches or mm). For example, the 7.62×51mm NATO refers to a bore diameter of 7.62 mm and has an overall case length of 51 mm, with a total length of 71.1 mm. The commercial version is the .308 Winchester. In older black powder cartridges, the second number typically refers to powder charge, in grains.

  7. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    Jewelers must be careful when molding the metal in a diamond ring. [53] Diamond powder of an appropriate grain size (around 50 microns) burns with a shower of sparks after ignition from a flame. Consequently, pyrotechnic compositions based on synthetic diamond powder can be prepared.