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  2. .30 carbine - Wikipedia

    en.wikipedia.org/wiki/.30_Carbine

    The .30 carbine's relatively straight case and round nose bullet have misled some to believe it was designed for use in pistols.) The .30 carbine uses a lighter bullet (110 grain versus 165 grain) and improved powder. As a result, it has approximately 41% higher muzzle velocity with 27% more impact energy than the parent .32 WSL cartridge.

  3. M27 Infantry Automatic Rifle - Wikipedia

    en.wikipedia.org/wiki/M27_Infantry_Automatic_Rifle

    [30] 1st Battalion, 3rd Marines were deployed to Afghanistan in April 2011 with 84 IARs. Former SAW gunners initially did not like the M27 but appreciated it as time went on. [citation needed] It weighed 9 lb (4 kg) loaded, compared to 22 lb (10 kg) for an M249, which was a significant difference when on five-hour missions. Gunners said it was ...

  4. .30-30 Winchester - Wikipedia

    en.wikipedia.org/wiki/.30-30_Winchester

    The .30-30 Winchester / 7.8x51mmR (officially named the .30 Winchester Center Fire or .30 WCF) cartridge was first marketed for the Winchester Model 1894 lever-action rifle in 1895. [4] The .30-30 (pronounced "thirty-thirty"), as it is most commonly known, along with the .25-35 Winchester , was offered that year as the United States' first ...

  5. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    While modern firearms are generally referred to by the name of the cartridge the gun is chambered for, they are still categorized together based on bore diameter. [citation needed] For example, a firearm might be described as a "30 caliber rifle", which could accommodate any of a wide range of cartridges using a roughly 0.30 inches (7.6 mm) projectile; or as a "22 rimfire", referring to any ...

  6. Smith & Wesson Model 27 - Wikipedia

    en.wikipedia.org/wiki/Smith_&_Wesson_Model_27

    When first introduced by Smith & Wesson in 1935, it was known as the Registered Magnum. [citation needed] The model was essentially a custom-order revolver.Barrel lengths could be had in 1 ⁄ 4 inch (6.4 mm) increments from 3 + 1 ⁄ 2 to 8 + 3 ⁄ 4 inches (8.9 to 22.2 cm) inches in length.

  7. North American Datum - Wikipedia

    en.wikipedia.org/wiki/North_American_Datum

    The definition of NAD 83(1986) is based on the GRS 80 spheroid, as was WGS 84, so many older publications indicate no difference. WGS 84 subsequently changed to a slightly less flattened spheroid. This change in flattening is about 0.1 mm, a difference so small that computational programs often do not distinguish between the two ellipsoids. [13]

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  9. Day count convention - Wikipedia

    en.wikipedia.org/wiki/Day_count_convention

    30U/360 - 30U/360 is not strictly the same as 30/360, it is used for the Euribor (Euro denominated Libor) curve and Euro denominated swaps, with the distinction that under 30/360, each day in a 31-day month accrues 30/31 of interest, whereas in 30U/360 payment occurs on the 30th and the 31st is considered to be part of the next month.