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  2. Gauge (firearms) - Wikipedia

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

    Note: Use of this table for estimating bullet masses for historical large-bore rifles is limited, as this table assumes the use of round ball, rather than conical bullets; for example, a typical 4-bore rifle from circa 1880 used a 2,000-grain (4.57 oz; 129.60 g) bullet, or sometimes slightly heavier, rather than using a 4-ounce (110 g) round ...

  3. Barrel threads - Wikipedia

    en.wikipedia.org/wiki/Barrel_threads

    Very common on European hunting rifles. Also used on some airsoft guns (although often in the left-hand version). 71/128"-25.4 M15.88 1.058 mm Very common on American rifles chambered for the 7.62 caliber (for example .300 BLK, 7.62x39 mm, .308 Win) 5/8"-24 M18 1 mm Common on European rifles with bull barrels. 45/64"-25.4

  4. Table of handgun and rifle cartridges - Wikipedia

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

    Introduced by Remington at the 2023 SHOT Show. Straight-walled cartridge based on a blown-out .30-30 Winchester case and designed for deer hunting in U.S. states that require hunters with modern rifles to use that cartridge shape. [51].376 Steyr: 1999 [3] Austria & US 2 [54] R 9.5×60mm 2754 4211 0.375 60mm

  5. 20-gauge shotgun - Wikipedia

    en.wikipedia.org/wiki/20-gauge_shotgun

    The 20-gauge shotgun, also known as 20 bore, is a type of smoothbore shotgun. 20-gauge shotguns have a bore diameter of .615 in (15.6 mm), while the 12-gauge has a bore diameter of .729 in (18.5 mm). [ 2 ] 12-gauge and 20-gauge shotguns are the most popular gauges in the United States .

  6. .404 Jeffery - Wikipedia

    en.wikipedia.org/wiki/.404_Jeffery

    The .404 Jeffery is a rifle cartridge designed for hunting large, dangerous game animals, such as the "Big Five" (elephant, rhino, cape buffalo, lion and leopard) of Africa. [5] The cartridge is standardized by the C.I.P. and is also known as .404 Rimless Nitro Express . [ 6 ]

  7. Taylor knock-out factor - Wikipedia

    en.wikipedia.org/wiki/Taylor_knock-out_factor

    These factors, along with Taylor’s dismissal of muzzle energy, allow many obsolete low powered large bore cartridges such as the .577/450 Martini-Henry and the .45-70 Government to have as much as twice the TKOF than the smaller bore general purpose hunting cartridges such as the .303 British and the .30-06 Springfield. For these reasons the ...

  8. 4 bore - Wikipedia

    en.wikipedia.org/wiki/4_bore

    The "4 bore rifle" caliber's technical data was reissued by C.I.P in 1993. The latest revision of the homologation papers were released by May 15, 2002. [8] This standard and its variations are reflected in obsolete 4 gauge shotgun cartridges and their repurposing as modern 1-inch (25.4 mm) bore flare cartridges. [9] [10] [11]

  9. Rifleman's rule - Wikipedia

    en.wikipedia.org/wiki/Rifleman's_rule

    If the rifleman wishes to adjust his rifle to strike a target at a distance instead of along an incline, he needs to adjust the bore angle of his rifle so that the bullet will strike the target at . This requires adjusting the rifle to a horizontal zero distance setting of R Z e r o = R H cos ⁡ ( α ) {\displaystyle R_{Zero}=R_{H}\cos(\alpha )} .