Handgun Cartridge Detail

Cartridge Specifications for Caliber: .50 GI

.50 GI (12.7×23mmRB)

Specifications
Case Type:	Rebated, straight
Introduced:	2008	Made For:	Semi-Auto
Cart Len:	1.221-in	Case Len:	0.899-in
Case Dia:	0.526-in	Bul Dia:	0.500-in

Ballistics measured with:
5-inch pistol barrel

Cartridge Variants
	Weight	Velocity	Energy
From:	185 gr	1299 ft/sec	591 ft-lbs
To	300 gr	700 ft/sec	326 ft-lbs

Cartridge Used in Database
Weight	Velocity	Energy
300 gr	700 ft/sec	326 ft-lbs

Rankings for Cartridge Used in Database
PF:	210000	TKO:	15.000

Description:

The .50 GI pistol cartridge was developed by Alex Zimmermann of Guncrafter Industries. The .50 GI was introduced at the 2004 SHOT Show alongside the Guncrafter Industries Model No. 1, a variation of the M1911. The round has a rebated rim that is the same diameter as that of the .45 ACP. It was purpose built to have a recoil impulse and kinetic energy substantially less than the magnum .50 caliber rounds such as the .50 Action Express. The cartridge is not used in law enforcement and rarely for personal defense due to limited availability of ammunition and guns currently chambered for the cartridge.