327 Federal Magnum

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


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The .327 Federal Magnum is a Center Fire cartridge with a Bullet Diameter of 0.312 in” (7.92mm) that is primarily used in Pistols. The .327 Federal Magnum originated in The United States in 2007. The .327 Federal Magnum also has a case length of 1.2 in” (30.48mm) and an overall length of 1.47 in” (37.34mm).


The .327 Federal Magnum cartridge is the .32 S&W Long cartridge reborn for modern smokeless powder loadings and is also the successor to the .32 H&R Magnum Cartridge, designed and release by Harrington & Richardson in the early 1980’s. The .327 Federal Magnum was developed and released in the late 2000’s by Sturm Ruger and Federal Cartridge, originally intended for use in the SP-101 Revolver, and drastically improves the capabilities of the second generation .32 H&R Magnum cartridge.

The .327 Federal Magnum, with very high pressures and increased case capacity, is capable of delivering a .32 Caliber 100-grain projectile at over 1500fps from a 4 inch barrel. In terms of pressure, the .32 Federal Magnum is loaded excessively high at pressures around 45,000 psi, making it one of the highest pressure commercially loaded revolver cartridges of the current generation, bringing it just short of (and sometimes right in line with) velocities and muzzle energies of the larger .357 Magnum Cartridge.

The .327 Federal Magnum is a versatile cartridge, and the revolvers such as the Ruger Single Seven prove to be even more versatile being able to fire not only the .327 Federal Magnum cartridge, but also the .32 H&R, .32 S&W Short, and .32 S&W Long cartridges from the same firearm. The .32 Federal Magnum cartridge can also be chambered for use in Rifles, producing velocities of over 2000 fps with a 100-grain projectile, making it a suitable Rifle cartridge to take small game and Deer at moderate to close ranges.

Cartridge Details

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  • Primer:
  • 2007
  • The United States
  • Rimmed, Straight
  • Pistols
  • 0.312 in” (7.92mm)
  • 0.337 in” (8.56mm)
  • N/A
  • 0.337 in” (8.56mm)
  • 0.375 in” (9.53mm)
  • 0.06 in” (1.4mm)
  • 1.2 in” (30.48mm)
  • 1.47 in” (37.34mm)
  • Center Fire (Small Pistol)

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