4.38×30mm Libra
TypePersonal defence weapon
Pistol
Place of originCzech Republic
Production history
DesignerVlastimil Libra
Designed2002
ManufacturerCzech Weapons (ČZW)
Specifications
Parent case.22 Hornet
Case typeRimless, bottlenecked
Bullet diameter4.40 mm (0.173 in)
Land diameter4.28 mm (0.169 in)
Neck diameter4.90 mm (0.193 in)
Shoulder diameter6.88 mm (0.271 in)
Base diameter7.56 mm (0.298 in)
Rim diameter7.65 mm (0.301 in)
Rim thickness1.24 mm (0.049 in)
Case length30.10 mm (1.185 in)
Overall length41.00 mm (1.614 in)[1]
Maximum pressure430 MPa (62,000 psi)[1]
Ballistic performance
Bullet mass/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.

Description

It was designed and has been manufactured by ČZW for use in their ČZW-438 PDW.[2]

The cartridge is based on a .22 Hornet cartridge converted to a rimless design and necked down to .17 calibre.[3]

Variants

  • .17 Libra [4.38×30mm]: A rimless varmint-hunting and sport-shooting cartridge
  • .17 Rimmed Libra [4.38×30mmR]: A rimmed varmint-hunting and sport-shooting cartridge for use with break-open actions
  • .17 Libra Magnum [unknown]: A longer, more powerful 4.38mm rimless round for use in pistols or personal defense weapons

See also

References

  1. 1 2 "17 Libra" (PDF). C.I.P. TDCC. Archived from the original (PDF) on 18 November 2020. Retrieved 18 July 2013.
  2. ↑ Czech Weapons Product Page http://www.czechweapons.com/en/czw-438/
  3. ↑ ".17 Libra". municion.org. Munición. Retrieved 18 July 2013.


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