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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[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] | ||||||||||||||||
History and Usage edit
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.
References edit
- ^ a b Abbott, Peter, and Rodrigues, Manuel, Modern African Wars 2: Angola and Mozambique, 1961-1974, Osprey Publishing (1998), p. 18
- ^ "Mitragliatrice Breda Mod 37 8mm 1940 | PDF".
- ^ a b Istruzione sulla Mitragliatrice Fiat 35 (PDF). Ministero della Guerra. Archived from the original on March 31, 2022. Retrieved March 30, 2022.
{{cite book}}: CS1 maint: bot: original URL status unknown (link) - ^ Johnson, Melvin M. Jr. (1944). Rifles and Machine Guns. New York: William Morrow & Company. p. 384.
- "8×59mm Breda, Italian Machine Gun Cartridge". ammo-one.com. Retrieved March 27, 2011.
"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.
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