8×59mm RB Breda

8×59mm RB Breda
A dug up Breda cartrdge.
Type	Machine gun
Place of origin	Kingdom of Italy
Service history
In service	1935–1960s
Used by	Italy, Portugal
Wars	World War II, Portuguese Colonial War
Production history
Designed	1935
Produced	1935–1960s
Specifications
Parent case	unknown
Case type	Rimless, bottleneck
Bullet diameter	8.36 mm (0.329 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)
Primer type	large rifle
Ballistic performance
Bullet mass/type Velocity Energy 208 gr (13 g) 2,600 ft/s (790 m/s) 4056J
Source(s):

8×59mm RB Breda was an Italian heavy arms cartridge.

8x59mm RB 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 and Breda M38. It was introduced in 1935 but is no longer in production today.