9×21mm Gyurza

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9×21mm Gyurza
Production information
Country of origin	Russia
Manufacturer(s)	TsNIITochMash
Designer(s)	TsNIITochMash
Production began	1990s
Technical specifications
Cartridge type	Rimless, straight walled
Overall length	32.7 mm (1.29 in)
Case length	20.9 mm (0.82 in)
Shoulder diameter	9.6 mm (0.38 in)
Base diameter	9.9 mm (0.39 in)
Rim diameter	9.9 mm (0.39 in)
Rim thickness	1.2 mm (0.047 in
Muzzle velocity	395 m/s (1,300 ft/s) to 410 m/s (1,300 ft/s)
Usage
Used by	Russia

The 9×21mm Gyurza is a Russian pistol cartridge developed by TsNIITochMash. It was designed to penetrate body armor, and is primarily chambered for the SR-2 Veresk submachine gun and the SR-1 Vektor pistol.

Performance

The bullet itself has a hard sub-caliber core contained inside an outer sleeve. The two components are separated from a polyethylene layer. This design makes the bullet effective against both unarmored and armoured targets. If the round hits an unarmored target, the core and the sleeve remain together, creating a wider wound in the target. If the round hits an armored target, the sleeve is stripped away from the core, leaving the core with much more penetration power as it strikes the armor.

Variants

• SP-10 (7N29) - Armor-piercing, hardened steel core variant.
• SP-11 (7N28) - Standard lead core FMJ.
• SP-12 - Expanding bullet with decreased ricochet.
• SO-13 (7BT3) - Tracer variant based on the SP-10.

References

• Wikipedia Article