8×59mm Rb Breda
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".
| 8×59mmRb Breda | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | |||||||||||||||
| 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 or 245 mm | |||||||||||||||
| Primer type | large rifle | |||||||||||||||
| Maximum pressure | 3150 atm 46,300 psi | |||||||||||||||
| Ballistic performance | ||||||||||||||||
| ||||||||||||||||
| Source(s): | ||||||||||||||||
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.