7.65×20mm Long

The 7.65×20mm Long (also known as 7.65mm French Long/Longue, 7.65mm MAS, 7.65×20mm, 7.65L, and .30-18 Auto for use in the Pedersen Device) was a straight, rimless cartridge used in the French Modèle 1935 pistol, as well as the MAS-38 submachine gun and the ETVS submachine gun.

7.65×20mm Long
7.65×20mm cartridge (steel case and steel-jacketed bullet).
TypeRifle and pistol
Place of originUnited States
Service history
Used byUnited States, France, Germany, Vietnam
Production history
DesignerRemington Arms
Designed1917
Produced1918–1960
Specifications
Case typeRimless, straight
Bullet diameter7.85 mm (0.309 in)
Land diameter7.65 mm (0.301 in)
Neck diameter8.50 mm (0.335 in)
Base diameter8.53 mm (0.336 in)
Rim diameter8.50 mm (0.335 in)
Case length19.70 mm (0.776 in)
Overall length30.24 mm (1.191 in)
Primer typeSmall pistol
Ballistic performance
Bullet mass/type Velocity Energy
77 gr (5 g) FMJ 1,132 ft/s (345 m/s) 219 ft⋅lbf (297 J)
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