Italian military service revolver cartridge adopted for the Bodeo Model 1889 revolver — the standard Italian sidearm through both World Wars. A solid double-action design for its era despite the modest cartridge.
Type: Revolver
Introduced: 1874, Italy
Parent case: None
Standardization: None
Bullet diameter: 0.422" (10.72 mm)
Case length: 0.89" (22.61 mm)
Max pressure: 18,000 PSI
Rim type: Rimmed
Primer: Berdan Large Pistol
Typical twist rate: 1:20
Muzzle velocity: 722–755 fps
Muzzle energy: 205–224 ft-lbs
Effective range: 35 yd
Common bullet weights: 177 gr
Primary use: Military
Production status: Discontinued
Also known as: 10.4mm Italian · 10.4x20mmR Chamelot-Delvigne
History: Adopted by the Italian Army in 1874 for the Chamelot-Delvigne revolver, later transitioning to the Bodeo M1889. The Bodeo M1889 served Italian officers and NCOs through WWI and WWII — an extraordinarily long service life for a 19th-century design. The cartridge's moderate performance was supplemented in WWII by widespread use of captured 9mm Glisenti and 9mm Luger pistols. Original Italian…
Notable firearms: Bodeo Modello 1889, Chamelot-Delvigne M1872
Military use: Italy
Similar cartridges: 11mm French Ordnance, 8mm Rast-Gasser