.577 Nitro Express

.577 Nitro Express 3-inch
The .577 Nitro Express is a large small-arms cartridge. In this picture, it is compared to one of the smallest cartridges, a .22 CB.
TypeRifle
Place of originUnited Kingdom
Service history
In service1915–1916
Used byBritish Army
WarsWorld War I
Production history
Designed1890s
Specifications
Parent case.577 Black Powder Express
Case typeRimmed straight
Bullet diameter.585 in (14.9 mm)
Land diameter.577 in (14.7 mm)
Neck diameter.610 in (15.5 mm)
Base diameter.660 in (16.8 mm)
Rim diameter.748 in (19.0 mm)
Rim thickness.052 in (1.3 mm)
Case length3.00 in (76 mm)
Overall length3.70 in (94 mm)
Case capacity185.3 gr H2O (12.01 cm3)
Ballistic performance
Bullet mass/type Velocity Energy
750 gr (49 g) 2,050 ft/s (620 m/s) 7,010 ft⋅lbf (9,500 J)
Test barrel length: 28 in (710 mm)
Source(s): Barnes and Kynoch
.577 Nitro Express 23⁄4-inch
Ballistic performance
Bullet mass/type Velocity Energy
750 gr (49 g) 1,800 ft/s (550 m/s) 5,400 ft⋅lbf (7,300 J)
Test barrel length: 28 in (710 mm)
Source(s): Kynoch.

The .577 Nitro Express (14.9×94mmR) is a large-bore centerfire rifle cartridge designed for the purpose of hunting large game such as elephant. This cartridge is used almost exclusively in single-shot and double express rifles for hunting in the Tropics or hot climates in general and is a cartridge associated with the golden age of African safaris and Indian shikars.

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