.222 rimmed
Centrefire fire cartridge
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The .222 rimmed / 5.7x43mmR is an intermediate 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]
