5.5mm Velo-Dog

Cartridge Data Published On: December 20, 2014 at 11:36 pm by Bullet-Blog and last updated on February 12, 2015 at 11:24 am


5.75mm Velo Dog


The 5.5mm Velo-Dog (AKA: 5.75mm Velo Dog) is a Center Fire cartridge with a Bullet Diameter of 0.225 in” (5.72mm) that is primarily used in Pistols. The 5.5mm Velo-Dog originated in France in 1894. The 5.5mm Velo-Dog also has a case length of 1.12 in” (28.45mm) and an overall length of 1.35 in” (34.29mm).


The 5.5mm Velo-Dog is the primary cartridge for the original Velo-Dog revolver, a small pocket sized pistol created in France for use as personal carry firearm to protect against attacks. The 5.5mm Velo-Dog is also known as the 5.75mm Velo-Dog, although the cartridge itself actually measures 5.5mm (.216″) making it slightly smaller and less powerful than a standard .22 Long Rifle cartridge. The 5.5mm Velo-Dog is considered a .22 Caliber center fire cartridge, produced from the late 1900s until approximately the mid 1990s by Fiocchi, but is now considered obsolete a possibly no longer in commercial production.

The 5.5mm Velo-Dog cartridge can still be formed as a wildcat cartridge today, however producing such a case would not be feasible from any existing commercially produced cartridges and this would have to be formed from brass stock. Alternatively, versions of the 5.5mm Velo-Dog Revolver existed in the early 20th Century re-chambered for both the .22 Long Rifle and the .25 ACP cartridge, both of which are still highly accessible today.

Cartridge Details

  • Year:
  • Origin:
  • Cartridge Type:
  • Application:
  • Bullet Diameter:
  • Neck Diameter:
  • Shoulder Diameter:
  • Base Diameter:
  • Rim Diameter:
  • Case Length:
  • Overall Length:
  • Primer:
  • 1894
  • France
  • Rimmed, Straight
  • Pistols
  • 0.225 in” (5.72mm)
  • 0.248 in” (6.3mm)
  • N/A
  • 0.253 in” (6.43mm)
  • 0.308 in” (7.82mm)
  • 1.12 in” (28.45mm)
  • 1.35 in” (34.29mm)
  • Center Fire (Small Pistol)

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