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The .375 Ruger
The .375 Ruger (9.5×65.5mm) is a rimless, standard-length rifle cartridge designed for the hunting of large dangerous game. It is designed to provide an increase in performance over the .375 H&H cartridge, yet to be chambered in a standard length action rifle. The cartridge was designed in partnership, by Hornady and Ruger. In 2007, it was released commercially and chambered in the Ruger Hawkeye African and the Ruger Hawkeye Alaskan rifles. Like the .376 Steyr that originates from the 9.3×64mm Brenneke and the .375 Dakota proprietary cartridge that originates from the .404 Jeffery, the .375 Ruger was designed to compete with the .375 H&H Magnum, yet have the advantage of having a rimless, beltless case and can function through a standard-length bolt action rifle due to a shorter overall length.
The .375 Ruger uses a unique cartridge case designed by Hornady and Ruger. The case is of a rimless design having the base and rim diameter of .532 in which is the same diameter of the belt on belted magnum cases based on the .300 H&H Magnum and .375 H&H Magnum. This allows the cartridge to have a greater case capacity than a belted magnum case given cases of equal length.
Unlike Remington Ultra Magnum cartridges, the Ruger Magnums can be chambered in standard length bolt-action rifles as Ruger intended the cartridge to be chambered in standard length bolt-action rifles. The case length was kept to 2.580 in which is only .04 in longer than the .270 Winchester case. The maximum overall length of the cartridge is 3.340 in which is similar to the maximum overall length to standard length cartridges such as the .338 Winchester Magnum or the .30-06 Springfield. This allowed Ruger to chamber the cartridge without extensively redesigning their M77 rifle to adopt them to the new Ruger cartridge.
While the .375 H&H Magnum is longer than the .375 Ruger, the latter cartridge has a greater case capacity than the Holland & Holland cartridge. This is due to the .375 H&H Magnum having a long tapered body while the .375 Ruger follows modern cartridge designs in that it has very little taper and a sharper shoulder.
The .375 Ruger's slightly greater case capacity, and the "short fat" cartridge efficiency lead to increases in the neighborhood of 150 fps over the H&H cartridge. The case capacity of the .375 Ruger is 99 gr. of water while the .375 H&H Magnum has a case capacity of 95 gr. of water, an increase of 4%. Their capabilities remain essentially comparable.
Currently Hornady and Double Tap manufacture ammunition for the .375 Ruger cartridge. The Hornady superformance ammunition drives a 270 gr SP-RP bullet at 2,840 ft/s and the 300 gr DGS and DGX bullets at 2,660 ft/s. The Double Tap achieves 2,825 ft/s and 4,700 ft⋅lb with a 270 grain Barnes TSX from a 23" barrel Ruger 77 African.
Since 2015 O.F. Mossberg & Sons produced bolt-action rifles of the ″Patriot″ series chambered in .375 Ruger with different stock options.
The .375 Ruger (9.5×65.5mm) is a rimless, standard-length rifle cartridge designed for the hunting of large dangerous game. It is designed to provide an increase in performance over the .375 H&H cartridge, yet to be chambered in a standard length action rifle. The cartridge was designed in partnership, by Hornady and Ruger. In 2007, it was released commercially and chambered in the Ruger Hawkeye African and the Ruger Hawkeye Alaskan rifles. Like the .376 Steyr that originates from the 9.3×64mm Brenneke and the .375 Dakota proprietary cartridge that originates from the .404 Jeffery, the .375 Ruger was designed to compete with the .375 H&H Magnum, yet have the advantage of having a rimless, beltless case and can function through a standard-length bolt action rifle due to a shorter overall length.
The .375 Ruger uses a unique cartridge case designed by Hornady and Ruger. The case is of a rimless design having the base and rim diameter of .532 in which is the same diameter of the belt on belted magnum cases based on the .300 H&H Magnum and .375 H&H Magnum. This allows the cartridge to have a greater case capacity than a belted magnum case given cases of equal length.
Unlike Remington Ultra Magnum cartridges, the Ruger Magnums can be chambered in standard length bolt-action rifles as Ruger intended the cartridge to be chambered in standard length bolt-action rifles. The case length was kept to 2.580 in which is only .04 in longer than the .270 Winchester case. The maximum overall length of the cartridge is 3.340 in which is similar to the maximum overall length to standard length cartridges such as the .338 Winchester Magnum or the .30-06 Springfield. This allowed Ruger to chamber the cartridge without extensively redesigning their M77 rifle to adopt them to the new Ruger cartridge.
While the .375 H&H Magnum is longer than the .375 Ruger, the latter cartridge has a greater case capacity than the Holland & Holland cartridge. This is due to the .375 H&H Magnum having a long tapered body while the .375 Ruger follows modern cartridge designs in that it has very little taper and a sharper shoulder.
The .375 Ruger's slightly greater case capacity, and the "short fat" cartridge efficiency lead to increases in the neighborhood of 150 fps over the H&H cartridge. The case capacity of the .375 Ruger is 99 gr. of water while the .375 H&H Magnum has a case capacity of 95 gr. of water, an increase of 4%. Their capabilities remain essentially comparable.
Currently Hornady and Double Tap manufacture ammunition for the .375 Ruger cartridge. The Hornady superformance ammunition drives a 270 gr SP-RP bullet at 2,840 ft/s and the 300 gr DGS and DGX bullets at 2,660 ft/s. The Double Tap achieves 2,825 ft/s and 4,700 ft⋅lb with a 270 grain Barnes TSX from a 23" barrel Ruger 77 African.
Since 2015 O.F. Mossberg & Sons produced bolt-action rifles of the ″Patriot″ series chambered in .375 Ruger with different stock options.