Girish Mahajan (Editor)

12.7×55mm STs 130

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Type
  
Rifle

Parent case
  
.338 Lapua Magnum

Case length
  
54 mm (2.1 in)

Place of origin
  
Soviet Union Russia

Bullet diameter
  
12.7 mm (0.50 in)

Overall length
  
94 mm (3.7 in)

The 12.7×55mm Subsonic cartridge is used in the VKS bullpup sniper rifle. The cartridge can carry a projectile weighing between from 59 grams (911 grains) and 76 g (1173 gr), yielding massive amounts of kinetic energy. The round can penetrate up to 16 mm (0.63 in) of steel at 200 meters or heavy body armor at 100 meters. The accuracy of this cartridge is claimed as to be 1 MOA at 100 meters range.

Cartridge variants

  • STs-130 (СЦ-130) - standard
  • STs-130U (СЦ-130У) - 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)

    • References

    12.7×55mm STs-130 Wikipedia
    (Text) CC BY-SA