The 14.5×114 mm (.57 calibre) is a heavy machine gun and anti-materiel rifle cartridge used by the Soviet Union, the former Warsaw Pact, modern Russia, and other countries.
It was originally developed for the PTRS and PTRD anti-tank rifles, and was later used as the basis for the KPV heavy machine gun that formed the basis of the ZPU series anti-aircraft guns that is also the main armament of the BTR series of armoured personnel carriers from the BTR-60 to the BTR-80 and for heavy anti-materiel sniper rifles.
Cartridge dimensions The 14.5 × 114 mm has 42.53 ml (655 grains H2O) cartridge case capacity. The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action rifles, semi-automatic rifles, and heavy machine guns alike, under extreme conditions.
14.5 × 114 mm maximum cartridge dimensions. All dimensions in millimetres (mm), but angles may be measured in degrees or degrees-arcminutes-arcseconds (° ); alpha is 22.5°.
Americans define the shoulder angle at alpha/2 = 22.25°. The most common rifling twist rate for this cartridge is 1 in , with 8 grooves, land ⌀ , and groove ⌀ . Assuming a muzzle velocity of , as is roughly typical for it, this gives it a muzzle angular frequency of ≈ (; ). According to the official guidelines, the 14.5 × 114 mm case can handle up to 360 MPa (52,213 psi) piezo pressure. In C.I.P. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum C.I.P. pressure to be certified for sale to consumers.
Ammunition types
BS: Armour-piercing incendiary original anti-tank round. The projectile weighs and is long with a core of tungsten carbidePobedit-style alloy Re8 (РЭ8) containing 8% cobalt. Commonly described as a "cermet" in Russian sources. with of incendiary material in the tip. The overall round weighs approximately and is long. The projectile has a muzzle velocity of approximately , giving it a translational kinetic energy of and a rotational kinetic energy of , assuming its nominal diameter of rather than the average diameter left behind by the rifling of - the range is between treating the cartridge as an ellipsoid versus a cylinder for the purposes of moment of inertia. Using the rifled diameter yields . It can penetrate of RHA steel at an incidence of 0 degrees at a range of , or at a range of ."Armor", Volume 81 Issue 6. United States Armor Association. 1972. p. 43. B-32: Armour-piercing incendiary full-metal-jacket round with a hardened steel core. Projectile weight is and muzzle velocity is . Armour penetration at is of RHA at 90 degrees. BZT: Armour-piercing incendiary tracer full-metal-jacket round with a steel core. Projectile weight is and muzzle velocity is . Tracer burns to at least . MDZ: High-explosive incendiary bullet of instant action. Projectile weight is . ZP: Incendiary tracer round
Cartridges use lacquered steel cases and percussion primers. Some countries also use brass cartridge cases. The propellant consists of smokeless powder with seven tubes, designated as "5/7NA powder". Two different versions of bullet series are known, the earlier has a conventional bullet jacket with a boat-tail. These have a long engraving portion that causes considerable barrel wear. The newer bullet types have a smaller engraving portion with a rounder boat-tail and were used from about 1957 onward.
The cartridge has been manufactured in Bulgaria, China, Egypt, Hungary, Iraq, North Korea, Poland, Romania, Russia, and the former Czechoslovakia. There are new Chinese armour-piercing types:
DGJ02: APIDS-T cartridges use tungsten penetrators, wrapped in discarding sabots (similar to the US military SLAP cartridges) with dual colour tracers to aid ranging. The sabot splits and leaves the penetrator between and from the muzzle. It has a muzzle velocity of and is quoted as being able to penetrate of armour plate set at an angle of 60° at . DGE02: APHEI cartridges are reportedly absurdly heavy, . At it is quoted as having a 90 percent chance of being able to penetrate of armour plate set at 30°. At after penetrating a soft steel plate (representing an aircraft skin) it can further penetrate a thick steel plate producing 20 fragments. Upon explosion between 75 and 95 incendiary pieces are formed which have an 80% chance of igniting aviation fuel.
Chambered weapons Anti-materiel rifles Anzio rifle Cadex CDX-X145 Denel NTW-20 Gepard M-3 MCR Horizon's Lord Istiglal IST-14.5 Mambi-1 AMR PDSHP PTRS-41 (anti-tank rifle) PTRD-41 (anti-tank rifle) Shaher Snipex T-Rex Snipex Alligator Truvelo 14.5×114mm Vidhwansak Şer rifle (home made anti-materiel rifle)
Machine guns Slostin machine gun (heavy variant) KPV heavy machine gun Chinese Type 56 (KPV) and Type 58 (KPVT) heavy machine guns Type 02/QJG-02 heavy machine gun
Other ZPU anti-aircraft guns 2Kh35 inserted unified self-loading gun2Kh35 Inserted unified self-loading gun
In addition to being chambered in multiple calibers, the Ukrainian Horizon's Lord rifle uses its own proprietary "12.7 × 114 HL" cartridge made by necking down a 14.5 × 114 mm cartridge case to accept a .50 BMG bullet. In essence, the 14.5 × 114mm cartridge is the parent case for the 12.7 × 114 HL.
See also 12.7 × 108 mm .50 BMG 20 mm caliber 23 mm caliber 25 mm caliber 30 mm caliber
References
Further reading
External links
14,5x114 large-caliber cartridges