9×30mm Grom

9×30mm Grom
Place of originRussia
Production history
Designed1992–1993
Specifications
Parent case5.45×39mm (also blank)
Case typeRimless, tapered
Bullet diameter9.02 mm (0.355 in)
Land diameter8.82 mm (0.347 in)value from 9×19mm
Neck diameter9.65 mm (0.380 in)value from 9×19mm
Base diameter9.93 mm (0.391 in)value from 9×19mm
Rim diameter9.96 mm (0.392 in)value from 9×19mm
Rim thickness1.27 mm (0.050 in)value from 9×19mm
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
6.42–6.55 g (99–101 gr) Standard 600–610 m/s (2,000–2,000 ft/s) 1,155.6–1,218.6 J (852.3–898.8 ft⋅lbf)
6.70–6.74 g (103–104 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):

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.

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