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.
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 9×21mm Gyurza cartridge, it has a black painted tip.
The case is a stretched 9x19mm case, 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.
See also
9×23mm Winchester
9×25mm Mauser
9x29mm
9×25mm Dillon – shorter but wider 9mm bottlenecked cartridge with the same capacity