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".
Quick Facts Type, Place of origin ...
8×59mmRb Breda |
---|
A Breda cartridge discovered buried in the ground |
Type | Machine gun |
---|
Place of origin | Italy, Kingdom of Italy |
---|
|
In service | 1935–1960s |
---|
Used by | Italy, Portugal[1] |
---|
Wars |
|
---|
|
Designed | 1935 |
---|
Produced | 1935–1960s |
---|
|
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 |
---|
|
|
|
Bullet mass/type |
Velocity |
Energy |
13 g (201 gr) |
790 m/s (2,600 ft/s) |
4,057 J (2,992 ft⋅lbf) |
13.4 g (207 gr) Ball mod. 35 |
750 m/s (2,500 ft/s) |
3,768 J (2,779 ft⋅lbf) |
12.57 g (194 gr) AP mod. 39 |
|
|
|
Source(s): [4][3] |
Close