9×21mm Gyurza
| 9×21mm | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 9x21 RG054 cartridge - the predecessor of SP10. | ||||||||||||||||
| Type | Pistol | |||||||||||||||
| Place of origin | Russia | |||||||||||||||
| Service history | ||||||||||||||||
| Used by | FSB Russian Army | |||||||||||||||
| Production history | ||||||||||||||||
| Designer | TsNIITochMash | |||||||||||||||
| Produced | 1990s–present | |||||||||||||||
| Variants | SP-10 (7N29), SP-11 (7N28), SP-12, SP-13 (7BTZ) | |||||||||||||||
| Specifications | ||||||||||||||||
| Case type | Straight, rimless | |||||||||||||||
| Bullet diameter | 9.05 mm (0.356 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) | |||||||||||||||
| Case length | 20.9 mm (0.82 in) | |||||||||||||||
| Overall length | 32.7 mm (1.29 in) | |||||||||||||||
| Ballistic performance | ||||||||||||||||
| ||||||||||||||||
| Source(s): Modern Firearms | ||||||||||||||||
The 9×21mm Gyurza (Гюрза, Russian for "blunt-nosed viper") round is a Russian handgun round designed to defeat body armor that was developed by TsNIITochMash for its SR-1 Vektor semi-automatic pistol and SR-2 Veresk submachine gun.
Performance
The method of construction of the rounds allows them to be effective against both unarmored and armored targets. The bullet has a hard sub-caliber core contained within an outer sleeve and separated from it by a polyethylene layer. If the bullet strikes an unarmored target, it holds together to produce a wide wound channel. If the bullet strikes an armored target, the sleeve is stripped away and the core penetrates alone. The 7N29 AP loading fires a 6.7 g (103 gr) bullet at 410 m/s (1,300 ft/s) with 560 J (410 ft⋅lb) of muzzle energy, and will reportedly penetrate two 1.2 mm titanium plates, plus 30 layers of Kevlar, at 50 m (160 ft). The disadvantage of the rounds is that high impact velocities are needed for them to work effectively, so the bullets are relatively light to maximize their muzzle velocity. This means they will lose velocity relatively quickly, limiting their effective range.[1]
Variants
SP-10 (7N29) - armor-piercing bullet with hardened steel core[2][3]
SP-11 (7N28) - standard FMJ bullet with lead core
SP-12 - low ricocheting, expanding bullet[4]
SP-13 (7BT3) - tracer AP bullet based on 7N29
Designations
- 9×21mm Gyurza
- 9mm Gyurza
Notes
- ^ Where Next For PDWs? by Anthony G Williams Archived 2014-07-14 at the Wayback Machine
- ^ "Russian 9mm ammunition". Archived from the original on 2016-08-12. Retrieved 2010-10-17.
- ^ https://armstrade.org/includes/periodics/news/2022/1122/151570479/detail.shtml
- ^ "9x21mm variants".
External links
- 9×21mm pistol cartridges Archived 2014-01-07 at the Wayback Machine
- 9x21mm Ammunition (Russian)
- SR-1 Vector - Modern Firearms
- SP Ammunition - Modern Firearms
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