| Parent case | : .223 Remington |
| Case type | : Rimless, Bottleneck |
| Bullet diameter | : 5.70mm (0.224 in) |
| Neck diameter | : 6.43mm (0.253 in) |
| Shoulder diameter | : 9.00mm (0.354 in) |
| Base diameter | : 9.58mm (0.337 in) |
| Rim diameter | : 9.60mm (0.378 in) |
| Rim thickness | : 114mm (0.045 in) |
| Case length | : 44.70mm (1.760 in) |
| Overall leght | : 57.40mm (2.260 in) |
| Case capacity | : 1.85 cm3 (28.5 gr H20) |
| Rifling twist | : 178mm or 229mm (1 in 7 in or 9 in, originally 1 in 14 in) |
| Primal type | Small rifle |
| Maximum pressure(EPVAT) | 430.00 MPa (62,366 psi) |
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