.222 Remington Magnum
Rifle cartridge / From Wikipedia, the free encyclopedia
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The .222 Remington Magnum was a short-lived commercially produced cartridge derived from the .222 Remington. Originally developed for a US military prototype ArmaLite AR-15 rifle in 1958, the cartridge was not adopted by the military, but was introduced commercially in sporting rifles.
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Quick Facts Type, Place of origin ...
.222 Remington Magnum | ||||||||||||||||
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Type | Rifle | |||||||||||||||
Place of origin | United States | |||||||||||||||
Production history | ||||||||||||||||
Designer | Remington | |||||||||||||||
Designed | 1957 | |||||||||||||||
Produced | 1958–Present | |||||||||||||||
Specifications | ||||||||||||||||
Parent case | .222 Remington | |||||||||||||||
Case type | Rimless, bottleneck | |||||||||||||||
Bullet diameter | .224 in (5.7 mm) | |||||||||||||||
Neck diameter | .253 in (6.4 mm) | |||||||||||||||
Shoulder diameter | .357 in (9.1 mm) | |||||||||||||||
Base diameter | .376 in (9.6 mm) | |||||||||||||||
Rim diameter | .378 in (9.6 mm) | |||||||||||||||
Case length | 1.850 in (47.0 mm) | |||||||||||||||
Overall length | 2.280 in (57.9 mm) | |||||||||||||||
Rifling twist | 1-12 in (300 mm) | |||||||||||||||
Primer type | Small rifle | |||||||||||||||
Maximum CUP | 50,000[1] CUP | |||||||||||||||
Ballistic performance | ||||||||||||||||
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Test barrel length: 24" Source(s): Hodgdon [2] |
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