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  2. Primer (firearms) - Wikipedia

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

    In 2002, Hornady introduced a new .17 caliber cartridge based on the .22 WMR, the .17 HMR. The .17 HMR is essentially a .22 WMR cartridge necked down to accept a .17-caliber bullet and is used as a flat-shooting, light-duty varmint round. The .17 HMR was followed up by Hornady's .17 Mach 2, or .17 HM2 in 2003, which is based on a slightly ...

  3. Rimfire ammunition - Wikipedia

    en.wikipedia.org/wiki/Rimfire_ammunition

    Rimfire ammunition. Schematic of a rimfire cartridge and its ignition. A rim-fire (or rimfire) is a type of metallic cartridge used in firearms where the primer is located within a hollow circumferential rim protruding from the base of its casing. When fired, the gun's firing pin will strike and crush the rim against the edge of the barrel ...

  4. .17 HM2 - Wikipedia

    en.wikipedia.org/wiki/.17_HM2

    17 gr (1 g) V-Max. 2,100 ft/s (640 m/s) 166 ft⋅lbf (225 J) Source (s): Hornady [1] The .17 Hornady Mach 2, commonly known as the .17 HM2, is a rimfire cartridge introduced in 2004 by the ammunition manufacturer Hornady, following the successful launch in 2002 of the .17 HMR. The .17 HM2 is based on the .22 Long Rifle "Stinger" case, necked ...

  5. .17 HMR - Wikipedia

    en.wikipedia.org/wiki/.17_HMR

    Source (s): Hornady [2] .17 Hornady Magnum Rimfire, commonly known as the .17 HMR, is a rimfire rifle cartridge developed by Hornady [3] in 2002. It was developed by necking down a .22 Winchester Magnum Rimfire case to take a .17 caliber (4.5mm) projectile. Commonly loaded with a 17 grain (1.1 g) projectile, it can deliver muzzle velocities in ...

  6. .17 Remington - Wikipedia

    en.wikipedia.org/wiki/.17_Remington

    The .17 Remington is based on the .223 Remington case necked down to .172 in (4.37 mm), with the shoulder moved back. [5][6] Extremely high initial velocity (over 4,000 ft/s 1,200 m/s), flat trajectory and very low recoil are the .17 Remington's primary attributes. It has a maximum effective range of about 440 yards (400 m) on prairie dog ...

  7. .17 Remington Fireball - Wikipedia

    en.wikipedia.org/wiki/.17_Remington_Fireball

    The .17 Remington Fireball / 4.4x36mm was created in 2007 by Remington Arms Company as a response to the popular wildcat round, the .17 Mach IV. Factory loads drive a 20 grain (1.3 g) bullet around 4,000 ft/s (1,219 m/s). Velocity is close to the .17 Remington but with significantly less powder, and therefore less heat and fouling.

  8. Cartridge (firearms) - Wikipedia

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

    2. Cartridge case, which holds all parts together; 3. Propellant, for example, gunpowder or cordite; 4. Rim, which provides the extractor on the firearm a place to grip the casing to remove it from the chamber once fired; 5. Primer, which ignites the propellant. A cartridge, [1][2] also known as a round, is a type of pre-assembled firearm ...

  9. List of rimfire cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_rimfire_cartridges

    The most common rimfire cartridges are chambered for .17 caliber and .22 caliber. The bullet diameter for .17 caliber firearms generally measure .172 inch (4.37 mm), while the bullet diameter for .22 caliber firearms generally measure .222 inch (5.64 mm).

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