8×59mm Rb Breda
Machine gun cartridge / From Wikipedia, the free encyclopedia
8×59mmRb Breda was an Italian heavy arms cartridge. It is unusual in that it is one of the small number of cartridges designed with a rebated rim, meaning the rim of the cartridge is smaller in diameter than the body of the cartridge. The "Rb" in the designation stands for "rebated rim".
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Quick Facts Type, Place of origin ...
8×59mmRb Breda | ||||||||||||||||
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![]() A Breda cartridge discovered buried in the ground | ||||||||||||||||
Type | Machine gun | |||||||||||||||
Place of origin | Italy, Kingdom of Italy | |||||||||||||||
Service history | ||||||||||||||||
In service | 1935–1960s | |||||||||||||||
Used by | Italy, Portugal[1] | |||||||||||||||
Wars | ||||||||||||||||
Production history | ||||||||||||||||
Designed | 1935 | |||||||||||||||
Produced | 1935–1960s | |||||||||||||||
Specifications | ||||||||||||||||
Parent case | unknown | |||||||||||||||
Case type | rebated rim, bottleneck | |||||||||||||||
Bullet diameter | 8.36 mm (0.329 in) | |||||||||||||||
Land diameter | 8.0 mm (0.31 in) | |||||||||||||||
Neck diameter | 9.14 mm (0.360 in) | |||||||||||||||
Shoulder diameter | 10.80 mm (0.425 in) | |||||||||||||||
Base diameter | 12.49 mm (0.492 in) | |||||||||||||||
Rim diameter | 11.92 mm (0.469 in) | |||||||||||||||
Rim thickness | 1.40 mm (0.055 in) | |||||||||||||||
Case length | 58.84 mm (2.317 in) | |||||||||||||||
Overall length | 80.44 mm (3.167 in) | |||||||||||||||
Rifling twist | 240[2] or 245[3] mm | |||||||||||||||
Primer type | large rifle | |||||||||||||||
Maximum pressure | 3150 atm 46,300 psi | |||||||||||||||
Ballistic performance | ||||||||||||||||
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Source(s): [4][3] |
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