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12.7×55mm STs-130
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Russian military subsonic intermediate rifle cartridge
August 2013
Product January 2023
12.7×55mm VKS Ammo.jpg From left to right, STs-130PT (sniper), STs-130PT2 (sniper with solid bronze bullet), STs-130VPS (high penetration / armor piercing). Russian Federation Rifle 2002 yes .338 Lapua Magnum 13.01 mm on 13.76 14.86 54.91 mm on STs-130 - 97.3 mm onPS-12 - 73 mm on yes gram 59 STs130PT 295 2567 48.2 STs130PT2 295 2097 76 STs130VPS 295 3307 33 PS-12 300 1485 17.94 PS-12B 300 807.3
The 12.7×55mm cartridge is used in some Russian firearms such as the VKS bullpup sniper rifle, the ShAK-12 bullpup battle rifle and the RSh-12 revolver. The cartridge can carry a projectile weighing between 108 grains and 1173 grains and is predominantly used to fire heavy subsonic loads. The high penetration VKS round can penetrate up to 16 mm on of steel at 200 m yard or body armor up to GOST 5A or NIJ III at 100 m yard. The accuracy of this cartridge when loaded with precision VKS bullets is claimed to be one MOA at 100 m yard up to the effective range limit of 690 m yard.
Despite being chambered in the same cartridge, the ShAK-12 (and RSh-12) would not be able to feed or chamber rounds designed for the VKS due to significant length differences in the bullet component of the cartridge and thus requires its own, shorter, loads. The ShAK-12 rounds have less range compared to the VKS with the maximum effective range of the loads reaching in between 100 and 300 m yard.2011-12-05 ASh-12.7 https://modernfirearms.net/en/assault-rifles/russia-assault-rifles/ash-12-7-eng/ 2024-02-23 Modern Firearms en
Cartridge variants for use in the VKS
STs-130 (СЦ-130) - standard
STs-130PU (СЦ-130ПУ) - for training
STs-130PT (СЦ-130ПТ) - increased accuracy (59 gram bullet)
STs-130PT2 (СЦ-130ПТ2) - increased accuracy (solid bronze bullet)
STs-130VPS (СЦ-130ВПС) - increased penetration (76 gram bullet)
The MTs-558 ru МЦ-558 carbine, a civilian version of the VKS, is also designed for this full-length variant.
Cartridge variants for use in the ShAK-12 and RSh-12
section overall length for use in ShAK-12 (looks like no more than 65 mm) November 2021
thumb|From left to right, light bullet, double-bulleted, heavy bullet, and armor-piercing bullet
PS-12 [ПС-12] Tyazhelaya Pulya (TP) or "Heavy Bullet" - Heavy subsonic lead bullet weighing 33 grams (509 grains).
PS-12A [ПС-12А] Legkaya Pulya (LP) or "Light Bullet" - Light supersonic lead bullet with an aluminum core weighing 7 grams (108 grains).
PS-12B [ПС-12Б] Broneboynaya Pulya (BP) or "Armor-Piercing Bullet" - Lead bullet with an armor-piercing component weighing nearly 18 grams (277 grains).
PD-12 [ПД-12]Патроны 12,7×55 мм: ПД-12, ПС-12Б, СЦ-130 ПТ, ПТ2, ВПС [#787975] - Галерея - ВПК.name https://vpk.name/images/i787975.html vpk.name Dvukhpul'niy (DP) or "Double-Bulleted" - Two bullets loaded inline weighing 17 grams (262 grains) each.
STs-174 [СЦ-174]: civilian hunting load. Case headstamped 12.7x55 МЦ.12.7x55 Ammo boxes https://forum.cartridgecollectors.org/t/12-7x55-ammo-boxes/63699/7 International Ammunition Association Web Forum en 11 January 2025 For revolver carbine MTs-569 ru МЦ-569, a civilian hunting version of the RSh-12.Револьверный карабин МЦ-569 и МЦ-570 (Россия) https://modernfirearms.net/ru/sivilian-rifled/rossija-grazhdanskoe-nareznoe/mc-569-mc-570/ Modern Firearms ru 3 September 2021
See also
Thumper concept
Whisper (cartridge family)
List of AR platform cartridges
List of rifle cartridges
12 mm caliber
8.6 Blackout
.375 SOCOM
.45-70 Government
.45 Raptor
.450 Bushmaster
.458 SOCOM
.458 Winchester Magnum
.50 Beowulf
.50 Alaskan
.500 Auto Max
.510 Whisper
References
Category:Pistol and rifle cartridges
Category:Subsonic rifle cartridges