Cartridge Dimensions
The .38 Super has 1.14 ml (17.6 grains H2O) cartridge case capacity.
.38 Super maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm).
The common rifling twist rate for this cartridge is 406 mm (1 in 16 in), 6 grooves, ø lands = 8.79 mm, ø grooves = 9.02 mm, land width = 3.07 mm and the primer type is small pistol.
According to the official C.I.P. (Commission Internationale Permanente Pour L'Epreuve Des Armes A Feu Portatives) guidelines the .38 Super case can handle up to 230 MPa (33,359 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 SAAMI pressure limit for the .38 ACP or .38 Auto is set at 182.72 MPa (26,500 psi), piezo pressure.
The SAAMI pressure limit for the .38 Super +P is set at 251.66 MPa (36,500 psi), piezo pressure.
The C.I.P. and SAAMI specified .38 Super (+P) has a semi-rimmed cartridge case.
Read more about this topic: .38 Super
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