.17-223

.17-223
Left to right: .17/223 Norma Experimental, .17-223 Frankford Arsenal Experimental F A 7 2, .17-223 Frankford Arsenal Experimental F A 7 3, 4.3x45 D.A.G. Experimental DAG 4.3X45, 4.9x45 D.A.G. Experimental DAG .223, 4.7x45 Experimental DAG 4.7 MM, 4.85x49 Experimental XL1E1 RG 77 4.85
Type	Rifle
Place of origin	United States
Specifications
Parent case	.223 Remington
Case type	Rimless, bottleneck
Bullet diameter	.172 in (4.4 mm)
Neck diameter	.203 in (5.2 mm)
Shoulder diameter	.358 in (9.1 mm)
Base diameter	.376 in (9.6 mm)
Rim diameter	.378 in (9.6 mm)
Case length	1.76 in (45 mm)
Overall length	2.15 in (55 mm)
Primer type	Small rifle
Ballistic performance
Bullet mass/type Velocity Energy 25 gr (2 g) Hornady 3,929 ft/s (1,198 m/s) 875 ft⋅lbf (1,186 J) 25 gr (2 g) Hornady 3,940 ft/s (1,200 m/s) 862 ft⋅lbf (1,169 J) 25 gr (2 g) Hornady 3,989 ft/s (1,216 m/s) 883 ft⋅lbf (1,197 J)
Test barrel length: 22 in (560 mm) Source(s): Ammo Guide

The .17-223 / 4.4x45mm is a centerfire wildcat rifle cartridge. It is based on the .223 Remington, but the neck is re-sized to accept a .17 caliber bullet.

See also

• .17 Remington
• List of rifle cartridges
• 4 mm caliber

External links

• .17-Caliber Ultra Bomb! By Dave Moreton