The 9×30mm ''Grom'' (Гром.,

Russian Russian(s) may refer to: *Russians (), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries *A citizen of Russia *Russian language, the most widely spoken of the Slavic languages *''The Russians'', a b ...

for Thunder) is a Russian

round Round or rounds may refer to: Mathematics and science * Having no sharp corners, as an ellipse, circle, or sphere * Rounding, reducing the number of significant figures in a number * Round number, ending with one or more zeroes * Round (crypt ...

developed between 1992 and 1993, designed for the Gepard (submachine gun), it answers the need to defeat 1B2

body armor Body armour, personal armour (also spelled ''armor''), armoured suit (''armored'') or coat of armour, among others, is armour for human body, a person's body: protective clothing or close-fitting hands-free shields designed to absorb or deflect ...

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 The 9×19mm Parabellum (also known as 9mm Luger, 9mm NATO or simply 9mm) is a Rim (firearms)#Rimless, rimless, Centerfire ammunition, centerfire, tapered cartridge (firearms), firearms cartridge. Originally designed by Austrian firearm designer ...

and the armor piercing bullet was taken from the RG054 cartridge, it has a black painted tip. The case is a cutdown 5.45×39mm (also blankfiring) round, manufactured from phosphate

varnish Varnish is a clear Transparency (optics), transparent hard protective coating or film. It is not to be confused with wood stain. It usually has a yellowish shade due to the manufacturing process and materials used, but it may also be pigmente ...

ed steel. The

propellant A propellant (or propellent) is a mass that is expelled or expanded in such a way as to create a thrust or another motive force in accordance with Newton's third law of motion, and "propel" a vehicle, projectile, or fluid payload. In vehicle ...

s used are

pyroxylin Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and ...

(standard Soviet pistol powder "П-45","П-125" also used for blankfiring 5.45×39mm and 7.62×39mm) or

smokeless powder Finnish smokeless powder Smokeless powder is a type of propellant used in firearms and artillery that produces less smoke and less fouling when fired compared to black powder. Because of their similar use, both the original black powder formula ...

consisting of spherical ellipsoids which measure from 0.45–0.75mm, resulting in powder density of 0.95g/cm³.

References

Weapons and ammunition introduced in 1997 Pistol and rifle cartridges Military cartridges Russian inventions {{ammo-stub

Development

See also

References