.30 Carbine

The .30 Carbine (pronounced thirty carbine) cartridge is a carbine cartridge first made for the M1 carbine. The U.S. Army made this cartridge because it needed a bullet more powerful than the .45 ACP but lighter than the .30-06.

.30 Carbine (7.62×33mm)
Type	Carbine
Place of origin	United States
Service history
In service	World War II–present
Used by	See Users
Wars	World War II Korean War First Indochina War Vietnam War
Production history
Produced	World War II to 1950s, present (civilian)
Variants	M1 (ball), M6 (grenade), M13 (dummy), M18 (heavy, high pressure test) 152gr, M27 (tracer)
Specifications
Parent case	.32 Winchester Self-Loading
Bullet diameter	0.308 in (7.8 mm)
Neck diameter	.336 in (8.5 mm)
Base diameter	.3548 in (9.01 mm)
Rim diameter	.360 in (9.1 mm)
Rim thickness	.050 in (1.3 mm)
Case length	1.290 in (32.8 mm)
Overall length	1.680 in (42.7 mm)
Case capacity	21 gr H2O (1.4 cm3)
Rifling twist	1:20"
Primer type	Small rifle
Maximum pressure	38,500 psi (265 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 110 gr (7 g) FMJ 1,990 ft/s (610 m/s) 967 ft⋅lbf (1,311 J)
Test barrel length: 18 inches Source(s): Winchester

From a rifle, the .30 Carbine has about the same amount of firepower as the .357 Magnum.