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.357 Auto Magnum
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Caliber Specifications:
Caliber: | .357 Auto Magnum |
Standard / Datasheet: | C.I.P. |
Bullet Diameter: | 0.358" | 9.09mm |
Primer Size: | Small Pistol Magnum (SPM) |
Max. Case Length: | 1.299" | 32.99mm |
Max. Cartridge Length / OAL: | 1.600" | 40.64mm |
Max. Standardized Pressure: | 36985 psi | 2550 bar |
Case Capacity: | 35.0 Grains of Water | 2.27 cm3 |
CID: | CID_511 |
Last updated: | 2/20/2025 |
- The .357 Auto Magnum is a wildcat cartridge that is derived from the .357 Magnum. It is essentially a .357 Magnum cartridge that has been necked down to accept a 9mm bullet. This cartridge was designed to be used in a semi-automatic pistol, but it is not a standardized cartridge and is not commonly produced by ammunition manufacturers.
The .357 Auto Magnum has similar ballistics to the .357 Magnum cartridge, but with a smaller bullet diameter. It is not widely used or recognized, and its use may be limited due to the lack of standardized production and availability of ammunition. 
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Weight vs. Velocity - Suitable Bullets for this Caliber
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Barrel Length Variation vs. Velocity - by Bullet Weight
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