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The .222 Rimmed is a centrefire rifle cartridge, originating in Australia in the 1960s as a cartridge for single shot rifles, particularly the Martini Cadet action.[citation needed] Performance is similar to the .222 Remington on which it is based however loads should be reduced as the walls of the brass cases are generally thicker.[2] Extraction of cases that have been loaded to higher pressures can be difficult due to the inefficient extraction method utilised by the Martini Cadet.
.222 Rimmed | ||||||||||||||||||||
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Type | Rifle | |||||||||||||||||||
Place of origin | Australia | |||||||||||||||||||
Production history | ||||||||||||||||||||
Designed | 1960s | |||||||||||||||||||
Specifications | ||||||||||||||||||||
Case type | Rimmed, bottleneck | |||||||||||||||||||
Bullet diameter | .224 in (5.7 mm) | |||||||||||||||||||
Neck diameter | .265 in (6.7 mm) | |||||||||||||||||||
Shoulder diameter | .360 in (9.1 mm) | |||||||||||||||||||
Base diameter | .375 in (9.5 mm) | |||||||||||||||||||
Rim diameter | .450 in (11.4 mm) | |||||||||||||||||||
Case length | 1.700 in (43.2 mm) | |||||||||||||||||||
Overall length | 2.130 in (54.1 mm) | |||||||||||||||||||
Rifling twist | 1-12" | |||||||||||||||||||
Primer type | Small rifle [1] | |||||||||||||||||||
Ballistic performance | ||||||||||||||||||||
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Test barrel length: 24" |
Cases and loaded rounds were originally produced by the Super Cartridge Company.[3] Brass is now available from the Bertram Bullet Company[4] or can be made from 5.6x50mmR RWS cases.[2]
The .222 Rimmed has also been used as a parent case for wildcats, similar to ones based on the .222 Remington, such as rimmed versions of the .17 Mach IV, the .17-222, and the .20 VarTarg.[5]
See also
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