223 WSSM Ammo
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The .223 WSSM was introduced in 2003 by the Browning Arms Company, Winchester Ammunition, and Winchester Repeating Arms Company. The .223 WSSM designation is a reference to the popular .223 Remington.
The .223 WSSM offers a 600 ft/s (180 m/s) gain with a 55 gr (3.6 g) bullet over the standard .223 Rem. It also offers a 440 ft/s (130 m/s) gain over the .22-250, a popular varmint round.
- Parent case: .300 WSM
- 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 length: 1.670 in (42.4 mm)
- Overall length: 2.36 in (60 mm)
- Rifling twist: 1-7" to 1-9"