| 4.38×30mm Libra |
| Type |
Personal defence weapon |
| Place of origin |
 Czech Republic |
| Production history |
| Designer |
Vlastimil Libra |
| Designed |
2002 |
| Manufacturer |
Czech Weapons (ČZW) |
| Specifications |
| Parent case |
.22 Hornet |
| Case type |
Rimless, bottlenecked |
| Bullet diameter |
4.28 mm (0.169 in) |
| Neck diameter |
4.90 mm (0.193 in) |
| Shoulder diameter |
6.88 mm (0.271 in) |
| Base diameter |
7.56 mm (0.298 in) |
| Rim diameter |
7.65 mm (0.301 in) |
| Rim thickness |
1.24 mm (0.049 in) |
| Case length |
30.10 mm (1.185 in) |
| Overall length |
41.00 mm (1.614 in)[1] |
| Maximum pressure |
430 MPa (62,000 psi)CIP |
| Ballistic performance |
| Bullet weight/type |
Velocity |
Energy |
| 45 gr (3 g) Spitzer |
2,300 ft/s (700 m/s) |
528 ft·lbf (716 J) |
|
| Source(s): Small Arms Defense Journal |
The 4.38×30mm Libra (.17 Libra) is a centerfire cartridge designed for use in personal defense weapons. It was designed and has been manufactured by ČZW for use in their ČZW-438.[2]
The cartridge is based on a .22 Hornet cartridge converted to a rimless design and necked down to .17 calibre.[3] The .17 Libra has been standardized by C.I.P. to a pressure of 4300 bar.[1]
See also
References
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