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Data last updated on 2021-04-21 @ 16:13:46pm (EST)

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375 Ruger Ammo

375 Ruger Ammo For Sale - Best Collection With Top Vendors

The .375 Ruger (9.5×65.5mm) is a rimless, standard-length rifle cartridge designed for the hunting of massive, dangerous game. It intended to provide an increase in performance over the .375 H&H cartridge, yet be to chambered in a standard length action rifle.

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.375 Ruger 

  • Type Rifle
  • Place of origin USA
  • Production history
  • Designer Ruger
  • Designed 2007


  • Parent case Unique
  • Case type Rimless, bottleneck
  • Bullet diameter .375 in (9.5 mm)
  • Neck diameter .405 in (10.3 mm)
  • Shoulder diameter .515 in (13.1 mm)
  • Base diameter .532 in (13.5 mm)
  • Rim diameter .532 in (13.5 mm)
  • Rim thickness .050 in (1.3 mm)
  • Case length 2.580 in (65.5 mm)
  • Overall length 3.340 in (84.8 mm)
  • Case capacity 99.0 gr H2O (6.42 cm3)
  • Rifling twist 1-12" (304.8 mm)
  • Primer type Large rifle
  • Maximum pressure (SAAMI) 62,000 psi (430 MPa)
  • Maximum pressure (CIP) 62,004 psi (427.50 MPa)

Ballistic performance

Bullet mass/type Velocity Energy
270 gr (17 g) SP 2,840 ft/s (870 m/s) 4,835 ft⋅lbf (6,555 J)
300 gr (19 g) DGS 2,660 ft/s (810 m/s) 4,713 ft⋅lbf (6,390 J)
300 gr (19 g) DGX 2,660 ft/s (810 m/s) 4,713 ft⋅lbf (6,390 J)

The .375 Ruger uses a unique case designed by Hornady and Ruger. The case is of a rimless design having the base and rim diameter of .532 in (13.5 mm) which is the same diameter of the belt on belted magnum cases based on the .300 H&H Magnum and .375 H&H Magnum.

The Hornady performance ammunition drives a 270 gr (17 g) SP-RP bullet at 2,840 ft/s (870 m/s) and the 300 gr (19 g) DGS and DGX bullets at 2,660 ft/s (810 m/s). 

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