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.320 Revolver
Type Revolver
Place of originUnited Kingdom
Production history
Bullet diameter.3170 in (Bad rounding hereScript error mm)
Neck diameter.3200 in (Bad rounding hereScript error mm)
Base diameter.3220 in (Bad rounding hereScript error mm)
Rim diameter.3500 in (Bad rounding hereScript error mm)
Case length.6200 in (Bad rounding hereScript error mm)
Overall length.9000 in (Bad rounding hereScript error mm)
Rifling twist1 turn in 22 in (Bad rounding hereScript error mm)
Primer typeBerdan
Ballistic performance
Bullet weight/type Velocity Energy
80 gr (Script error g) Lead 168 m/s (Bad rounding hereScript error ft/s) 73 J (Bad rounding hereScript error ft·lbf)
Source(s): Cartridges of the World - 8th Edition (1997), Frank C. Barnes, page 245

Also known as the .320 European or .320 Bulldog, this revolver cartridge was designed for the Webley Bull Dog pocket revolver in the 1870s. The .32 Short Colt was based on the .320 but had a different sized rim. On some guns the Short Colt will actually fit and cycle properly. However, modern .32 Colt ammunition should never be used in a black-powder firearm. Reloading using reliable published data and a black-powder substitute like Pyrodex can be safe and successful.

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