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.327 Federal Magnum


The .327 Federal Magnum is a cartridge introduced by Federal Cartridge but also sold by Sturm, Ruger. The .327 has also been used in full-sized revolvers with a capacity of seven rounds or more. The .327 Federal Magnum is actually a super magnum having replaced the .32 H&R Magnum as the pinnacle of power in this diameter revolver cartridge.

327 Federal Magnum ammo, designed in 2008 is a 32 caliber round designed for personal defense and concealed carry. The .327 Federal Magnum is an attempt to improve on the .32 HR Magnum introduced in 1984.

32 Federal Magnum ammunition has a very tight following among its enthusiasts, and many companies have produced revolvers in the cartridge which is available for sale. This includes Ruger, Freedom Arms, Charter Arms, and Taurus. The caliber is known to be very potent for its small size and a very capable round for self-defense.

About .327 Federal Mag

  • Type Revolver
  • Place of origin United States
  • Designer: Federal Cartridge and Sturm, Ruger
  • Designed: 2007
  • Produced: 2008 – present


  • Parent case .32 H&R Magnum
  • Case type Rimmed, straight-walled
  • Bullet diameter .312 in (7.9 mm)
  • Neck diameter .337 in (8.6 mm)
  • Base diameter  .337 in (8.6 mm)
  • Rim diameter .375 in (9.5 mm)
  • Rim thickness .055 in (1.4 mm)
  • Case length 1.20 in (30 mm)
  • Overall length 1.47 in (37 mm)

Ballistic performance

Bullet mass/type Velocity Energy
100 gr (6 g) JHP 1,400 ft/s (430 m/s) 435 ft⋅lbf (590 J)
115 gr (7 g) JHP 1,300 ft/s (400 m/s) 431 ft⋅lbf (584 J)
100 gr (6 g) JHP* 1,655 ft/s (504 m/s) 640 ft⋅lbf (870 J)
115 gr (7 g) JHP* 1,587 ft/s (484 m/s) 620 ft⋅lbf (840 J)

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