The 9×25mm Super Auto G, officially known as the 9 × 25 Super Auto G by C.I.P. and unofficially also known as the 9 × 25 Super Auto Grillmeyer, is an Austrian pistol cartridge.
The
10mm Auto cartridge has functioned as the parent case for the 9×25mm Super Auto G, which is essentially a necked-down version of the 10mm Auto. The 10mm Auto cartridge case was used for this since it has the capability to operate with relative high chamber pressures for its case capacity which, combined with smaller and hence lighter
bullet
A bullet is a kinetic projectile, a component of firearm ammunition that is shot from a gun barrel. They are made of a variety of materials, such as copper, lead, steel, polymer, rubber and even wax; and are made in various shapes and constru ...
s result in very high muzzle velocities.
History
The cartridge got
C.I.P. (
) certified in 1991. The 9×25mm Super Auto G is currently (2009) not commercially available and exists only as a C.I.P. datasheet. It might however still used by a few shooters who produce the cases from 10mm Auto brass by reshaping the shoulder and neck, and
handloading it with 9 mm calibre bullets.
Cartridge dimensions
The 9×25mm Super Auto G has 1.60 ml (25.0
grains
A grain is a small, hard, dry fruit ( caryopsis) – with or without an attached hull layer – harvested for human or animal consumption. A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and le ...
) H
2O cartridge case capacity.
''9×25mm Super Auto G maximum C.I.P. cartridge dimensions''.
All sizes in millimeters (mm).
Americans define the shoulder angle at alpha/2 ≈ 19.9 degrees. The common
rifling
Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy. It is also the term (as a verb) for creating such groov ...
twist rate for this cartridge is 250 mm (1 in 9.84 in), 6 grooves, Ø lands = 8.82 mm, Ø grooves = 9.02 mm, land width = 2.49 mm and the
primer type is large pistol.
According to the official
C.I.P. (Commission Internationale Permanente Pour L'Epreuve Des Armes A Feu Portative) guidelines the 9×25mm Super Auto G case can handle up to 255 MPa (36,985 psi) piezo pressure. In C.I.P. regulated countries every pistol cartridge combo has to be
proofed at 130% of this maximum C.I.P. pressure to certify for sale to consumers.
The American
9×25mm Dillon pistol
wildcat cartridge
A wildcat cartridge, often shortened to wildcat, is a custom-made cartridge (weaponry), cartridge for which ammunition and/or firearms are not mass-produced. These cartridges are often created as experimental variants to optimize a certain ballis ...
is probably the closest ballistic twin of the 9×25mm Super Auto G. These cartridges are both necked down 9 mm variants of the 10mm Auto cartridge though they vary dimensionally.
See also
*
9×25mm Dillon
*
.357 SIG
References
{{DEFAULTSORT:9by25mm Super Auto G
Paramilitary cartridges
Pistol and rifle cartridges