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8×59mmRb Breda | ||||||||||||||||
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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] |
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 was a caliber created for use by the Royal Italian Army in World War II. The cartridge was originally designed for use in anti-aircraft heavy machine guns like the Breda M37, Breda M38, and Fiat–Revelli Modello 1935. It was also used in the experimental Pavesi M42 semi-automatic rifle. It was introduced in 1935 but is no longer in production today.
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: CS1 maint: bot: original URL status unknown (
link)
"8x59 mm. / 8 mm.Breda/ 8mm. FIAT/8 mm. Modelo 35/ DWM 591". municion.org. Archived from
the original on November 21, 2019. Retrieved February 14, 2013.