4.38×30mm Libra : Description Wikipedia, the free encyclopedia

4.38×30mm Libra

Cartridge for personal defence weapons

4.38×30mm Libra

Type

Personal defence weapon
Pistol

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

4.40 mm (0.173 in)

Land 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)^[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^{[citation needed]}

References

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

Cartridges with bullet diameter between 4 mm (0.16 in) and 5 mm (0.20 in)

Rimfire cartridges

.17 Mach 2
.17 HMR
.17 PMC/Aguila
.17 Winchester Super Magnum
4.5×26mm MKR
4mm M20

Centerfire cartridges

Pistol, carbine and PDW cartridges	4.25mm Liliput 4.38×30mm Libra 4.5×40mmR 4.6×30mm HK
Revolver cartridges	.17 Bumble Bee
Rifle cartridges	.17 Hornet .17 Mach IV .17 Remington .17 Remington Fireball .17 Ackley Bee 4.6×36mm 4.85×49mm

v t e Modern personal defense weapons (PDWs) and cartridges
Personal defense weapons	AO-46 AAC Honey Badger AKS-74U Brügger & Thomet MP9 Bushmaster Arm Pistol CF-05 ČZW-438 Floro PDW FN P90 FN SCAR PDW & FN SCAR SC GA Personal Defense Weapon GAU-5A Aircrew Self Defense Weapon Gepard (submachine gun) Heckler & Koch G11 PDW Heckler & Koch MP5K-PDW Heckler & Koch MP7 Interdynamics MKR Knight's Armament Company PDW Magpul PDR MARS Interdynamics MKS Joint Venture Protective Carbine PP-19 Vityaz PP-2000 PP-90M1 QCW-05 Saab Bofors Dynamics CBJ-MS SR-2 Veresk ST Kinetics CPW SIG MCX Rattler
PDW-caliber pistols	FN Five-seven FK BRNO Field Pistol, PSD GSh-18 Heckler & Koch UCP Kel-Tec P50 MP-443 M&P 5.7 Pindad PS-01 PSA 5.7 Rock QSW-06 QSZ-92 QSZ-11 Ruger-57 SR-1 Vektor
PDW cartridges	4.38×30mm Libra 4.5×26mm MKR HK 4.6×30mm 5.56×21mm PINDAD 5.56×30mm MINSAS .224 Boz FN 5.7×28mm 5.8×21mm DAP92 6.5×25 CBJ-MS 7.5 FK 9×19 mm 7N31 9×21mm Gyurza 9×39mm