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
10 mm Auto cartridge has functioned as the parent case for the 9×25mm Super Auto G, which is essentially a necked-down version of the 10 mm Auto. The 10 mm 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. Bullets are made of a variety of materials, such as copper, lead, steel, polymer, rubber and even wax. Bullets are made in various shapes and co ...
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 10 mm Auto brass by reshaping the shoulder and neck, and
handloading
Handloading, or reloading, is the practice of making firearm cartridges by assembling the individual components (case, primer, propellant, and projectile), rather than purchasing mass-assembled, factory-loaded ammunition.
The term ''hand ...
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 legume ...
) H
2O cartridge case capacity.
9×25mm Super Auto G maximum C.I.P. cartridge dimensions.
All sizes in millimeters (mm).
Americans would define the shoulder angle at alpha/2 ≈ 19.9 degrees. The common
rifling
In firearms, rifling is machining helical grooves into the internal (bore) surface of a gun's barrel for the purpose of exerting torque and thus imparting a spin to a projectile around its longitudinal axis during shooting to stabilize the pro ...
twist rate
In firearms, rifling is machining helical grooves into the internal (bore) surface of a gun's barrel for the purpose of exerting torque and thus imparting a spin to a projectile around its longitudinal axis during shooting to stabilize the pro ...
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
The 9×25mm Dillon is a pistol wildcat cartridge developed for use in USPSA/ IPSC Open guns. The cartridge is made by necking down a 10mm Auto case to 9 mm.
History
Around 1987, Randy Shelley, an employee of Dillon Precision, necked down 10mm A ...
pistol
wildcat cartridge
A wildcat cartridge, often shortened to wildcat, is a custom cartridge for which ammunition and/or firearms are not mass-produced. These cartridges are often created in order to optimize a certain performance characteristic (such as the power, s ...
is probably the closest ballistic twin of the 9×25mm Super Auto G. These cartridges are both necked down 9 mm variants of the
10 mm Auto cartridge though they vary dimensionally.
See also
*
9×25mm Dillon
The 9×25mm Dillon is a pistol wildcat cartridge developed for use in USPSA/ IPSC Open guns. The cartridge is made by necking down a 10mm Auto case to 9 mm.
History
Around 1987, Randy Shelley, an employee of Dillon Precision, necked down 10mm A ...
*
.357 SIG
The .357 SIG (designated as the 357 Sig by the SAAMI and 357 SIG by the C.I.P. or 9×22mm in unofficial metric notation) is a bottlenecked rimless centerfire handgun cartridge developed by the Swiss- German firearms manufacturer SIG Sauer, ...
References
{{DEFAULTSORT:9by25mm Super Auto G
Pistol and rifle cartridges