9×30mm Grom
Place of originRussia
Production history
Designed1992–1993
Specifications
Parent case5.45x39mm
Case typeRimless, tapered
Bullet diameter9.02–9.27 mm (0.355–0.365 in)
Land diameter8.82 mm (0.347 in)value from 9x19mm
Neck diameter9.65 mm (0.380 in)value from 9x19mm
Base diameter9.93 mm (0.391 in)value from 9x19mm
Rim diameter9.96 mm (0.392 in)value from 9x19mm
Rim thickness1.27 mm (0.050 in)value from 9x19mm
Case length30.05–30.20 mm (1.183–1.189 in)
Overall length40.8–41.1 mm (1.61–1.62 in)
Case capacity1.43cm3, with bullet inserted 1.11cm3
Maximum pressure260 MPa (38,000 psi)
Filling weight0.88- 1.05 g
Ballistic performance
Bullet mass/type Velocity Energy
1.6–1.7 g (25–26 gr) Standart 600–610 m/s (2,000–2,000 ft/s) 1,155.6–1,218.6 J (852.3–898.8 ft⋅lbf)
1.70–1.85 g (26–29 gr) Armor piercing 590–600 m/s (1,900–2,000 ft/s) 1,166.1–1,213.2 J (860.1–894.8 ft⋅lbf)
Test barrel length: Gepard (submachine gun)
Source(s): [1]

The 9×30mm Grom (Гром. , Russian for Thunder) is a Russian round developed between 1992 and 1993, designed for the Gepard (submachine gun), it answers the need to defeat 1B2 body armor at a range of 100 meters. [2][1]

Development

A regular and an armor piercing variant were designed, the non-armor piercing bullet taken from the 9×19mm Parabellum and the armor piercing bullet was taken from the RG054 cartridge, it has a black painted tip.[1]

The case is cut down 5.45x39mm case (modified blank round, originally filled with "П-45" propellant (pistol's 7.62×25mm)), manufactured from phosphate varnished steel. The propellants used are pyroxylin and smokeless powder consisting of spherical ellipsoids which measure from 0.45-0.75mm, resulting in powder density of 0.95g/cm3.[1]

See also

References

  1. 1 2 3 4 "ПРОМЕЖУТОЧНЫЙ ПАТРОН «ГРОМ» С ПУЛЕЙ СО СТАЛЬНЫМ СЕРДЕЧНИКОМ (РОССИЯ)".
  2. ↑ "ПАТРОН 9x30 мм «ГРОМ»".
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