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  2. .22-250 Remington - Wikipedia

    en.wikipedia.org/wiki/.22-250_Remington

    .22-250 Remington maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm) / Imperial (inches). The .22-250 Remington / 5.7x48mm is a very high-velocity, short action, .22 caliber rifle cartridge primarily used for varmint hunting and small game hunting. It is capable of reaching over 4,000 feet per second.

  3. Overpressure ammunition - Wikipedia

    en.wikipedia.org/wiki/Overpressure_ammunition

    Speer Gold Dot 124gr 9mm+P in SIG P226 magazines. Overpressure ammunition, commonly designated as +P or +P+ (pronounced Plus-P or Plus-P-Plus), is small arms ammunition that has been loaded to produce a higher internal pressure when fired than is standard for ammunition of its caliber (see internal ballistics), but less than the pressures generated by a proof round.

  4. .22 Savage Hi-Power - Wikipedia

    en.wikipedia.org/wiki/.22_Savage_Hi-Power

    The .22 Savage Hi-Power cartridge, also known as 5.6×52mmR, was created by Charles Newton and introduced by Savage Arms in 1912. It was designed to be used in the Savage Model 99 hammerless lever action rifle .

  5. .223 Winchester Super Short Magnum - Wikipedia

    en.wikipedia.org/wiki/.223_Winchester_Super...

    It is currently the fastest production .22 caliber round in the world with muzzle velocities as high as 4,600 feet per second (1,402 meters per second). However, the .220 Swift still holds the record as the fastest .22 caliber centerfire cartridge with a published velocity of 4,665 ft/s (1,422 m/s) using a 29-grain (1.9 g) projectile and 42 ...

  6. .22 caliber - Wikipedia

    en.wikipedia.org/wiki/.22_caliber

    .22 caliber, or 5.6 mm, refers to a common firearms bore diameter of 0.22 inch (5.6 mm) in both rimfire and centerfire cartridges. Cartridges in this caliber include the very widely used .22 Long Rifle and .223 Remington / 5.56×45mm NATO .

  7. .223 Remington - Wikipedia

    en.wikipedia.org/wiki/.223_Remington

    Robert Hutton (technical editor of Guns and Ammo magazine) started the development of a powder load to reach the 3,300 ft/s goal. He used DuPont IMR4198, IMR3031, and an Olin powder to work up loads. Testing was done with a Remington 722 rifle with a 22" Apex barrel. During a public demonstration, the round successfully penetrated the US steel ...

  8. P. O. Ackley - Wikipedia

    en.wikipedia.org/wiki/P._O._Ackley

    One of these experimental cartridges was the .22 Eargesplitten Loudenboomer. This humorously named cartridge was developed by Ackley for Bob Hutton of Guns & Ammo magazine, and was intended solely to exceed 5,000 ft/s (1,500 m/s) muzzle velocity. Ackley's loads only managed 4,600 ft/s (1,400 m/s)(Mach 4.2), firing a 50-grain (3.2 g) bullet.

  9. Accurizing - Wikipedia

    en.wikipedia.org/wiki/Accurizing

    To put lock time and bullet dwell time in perspective; the lock time of most conventional bolt action rifles varies between 2.6 and 9.0 milliseconds, while after cartridge ignition most rifle bullets travel through a high powered rifle barrel bore in 1.0 to 1.5 milliseconds. Mechanical bolt-action rifle trigger systems with a sub 2.0 ...

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