Parent case .223 Remington
Neck diameter .203 in (5.2 mm)
|Place of origin United States|
Bullet diameter .172 in (4.4 mm)
Shoulder diameter .358 in (9.1 mm)
The .17-223 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.
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