.223 Winchester Super Short Magnum

.223 WSSM
.223 WSSM with 75 gr (4.9 g) Hornady AMax bullet
TypeRifle
Place of originUnited States
Production history
DesignerBrowning & Winchester
Designed2002
ManufacturerWinchester
Produced2003–present
Specifications
Parent case.300 WSM
Case typeRimless, bottleneck
Bullet diameter.224 in (5.7 mm)
Neck diameter.272 in (6.9 mm)
Shoulder diameter.544 in (13.8 mm)
Base diameter.555 in (14.1 mm)
Rim diameter.535 in (13.6 mm)
Rim thickness.054 in (1.4 mm)
Case length1.670 in (42.4 mm)
Overall length2.362 in (60.0 mm)
Rifling twist1-7 in (180 mm) to 1-9 in (230 mm)
Primer typeLarge rifle
Ballistic performance
Bullet mass/type Velocity Energy
40 gr (3 g) BT (boat-tailed) 4,352 ft/s (1,326 m/s) 1,683 ft⋅lbf (2,282 J)
60 gr (4 g) JSP 3,733 ft/s (1,138 m/s) 1,857 ft⋅lbf (2,518 J)
75 gr (5 g) BT (boat-tailed) 3,378 ft/s (1,030 m/s) 1,901 ft⋅lbf (2,577 J)
Test barrel length: 24 in (610 mm)
Source(s): Hodgdon

The .223 WSSM (Winchester Super Short Magnum, 5.56×42mm) is a .224 caliber rifle cartridge created by Winchester and Browning based on a shortened version of the Winchester Short Magnum case.

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