.375 Ruger
Encyclopedia
The .375 Ruger 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 by Hornady and Ruger in partnership and released commercially in 2007 and chambered in the Ruger Hawkeye African and the Ruger Hawkeye Alaskan rifles.
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. As Ruger intended the cartridge to be chambered in standard length bolt action rifles the case length was kept to 2.58 in (65.5 mm) which is only 0.04 in (1 mm) longer than the .270 Winchester
case. The maximum overall length of the cartridge is 3.34 in (84.8 mm) which is similar to the maximum overall length to standard length cartridges such as the .338 Winchester Magnum
or the .30-06 Springfield
. Unlike Remington Ultra Magnum cartridges, the Ruger Magnums can be chambered in standard length bolt action rifles. This allowed Ruger to chamber the cartridge without extensively redesigning their M77 rifle platform 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 former. 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 case capacity of the .375 Ruger is 99.0 gr. of water (6.43 cm3) while the .375 H&H Magnum has a case capacity of 95.3 gr. of water (6.19 cm3) an increase of 4%.
Cartridge standards for the .375 Ruger was issued by SAAMI in June 2007. SAAMI recommends a 6 groove barrel having a bore Ø of 0.366 in (9.3 mm) and a groove Ø of 0.376 in (9.6 mm) with a groove width of 0.115 in (2.9 mm). The recommended rate of twist is one revolution in 12 in (304.8 mm). Recommended maximum pressure for the cartridge is 62000 psi (4,274.7 bar).
The.375 Rugers slightly greater case capacity, and the "short fat" cartridge efficiency lead to increases in the neighbourhood of 150 fps over the H&H cartridge. Their capabilities remain essentially comparable.
Cartridge (firearms)
A cartridge, also called a round, packages the bullet, gunpowder and primer into a single metallic case precisely made to fit the firing chamber of a firearm. The primer is a small charge of impact-sensitive chemical that may be located at the center of the case head or at its rim . Electrically...
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 by Hornady and Ruger in partnership and released commercially in 2007 and chambered in the Ruger Hawkeye African and the Ruger Hawkeye Alaskan rifles.
Design & Specifications
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 0.532 in (13.5 mm) which is the same diameter of the belt on belted magnum cases based on the .300 H&H Magnum.300 H&H Magnum
The .300 H&H Magnum Cartridge was introduced by the British company Holland & Holland as the Super-Thirty in June, 1925. The case was belted like the .375 H&H Magnum, and is based on the same case, as also is the .244 H&H Magnum. The belt is for headspace as the cases' shoulders have a narrow...
and .375 H&H Magnum
.375 H&H Magnum
The .375 Holland & Holland Magnum is a powerful rifle round and one of the best-known and most popular medium-bore cartridges in the world. The .375 H&H was only the second cartridge ever to feature a belt, now common among magnum rounds. A popular misconception is that the belt is for headspace,...
. This allows the cartridge to have a greater case capacity than a belted magnum case given cases of equal length. As Ruger intended the cartridge to be chambered in standard length bolt action rifles the case length was kept to 2.58 in (65.5 mm) which is only 0.04 in (1 mm) longer than the .270 Winchester
.270 Winchester
The .270 Winchester was developed by Winchester Repeating Arms Company in 1923 and unveiled in 1925 as a chambering for their bolt-action Model 54. The cartridge is based upon the .30-06 Springfield...
case. The maximum overall length of the cartridge is 3.34 in (84.8 mm) which is similar to the maximum overall length to standard length cartridges such as the .338 Winchester Magnum
.338 Winchester Magnum
The .338 Winchester Magnum is a .33 caliber belted rimless bottlenecked cartridge introduced in 1958 by Winchester Repeating Arms Company|Winchester. It is based on the blown out, shortened .375 H&H Magnum. The .33 is the caliber at which medium bore cartridges are considered to begin...
or the .30-06 Springfield
.30-06 Springfield
The .30-06 Springfield cartridge or 7.62×63mm in metric notation, was introduced to the United States Army in 1906 and standardized, and was in use until the 1960s and early 1970s. It replaced the .30-03, 6 mm Lee Navy, and .30 US Army...
. Unlike Remington Ultra Magnum cartridges, the Ruger Magnums can be chambered in standard length bolt action rifles. This allowed Ruger to chamber the cartridge without extensively redesigning their M77 rifle platform 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 former. 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 case capacity of the .375 Ruger is 99.0 gr. of water (6.43 cm3) while the .375 H&H Magnum has a case capacity of 95.3 gr. of water (6.19 cm3) an increase of 4%.
Cartridge standards for the .375 Ruger was issued by SAAMI in June 2007. SAAMI recommends a 6 groove barrel having a bore Ø of 0.366 in (9.3 mm) and a groove Ø of 0.376 in (9.6 mm) with a groove width of 0.115 in (2.9 mm). The recommended rate of twist is one revolution in 12 in (304.8 mm). Recommended maximum pressure for the cartridge is 62000 psi (4,274.7 bar).
Performance
Currently Hornady and Double Tap manufacture ammunition for the .375 Ruger cartridge. The Hornady superformace ammunition drives a Hornady 270 gr SP-RP bullet at 2840 ft/s (865.6 m/s) and the 300 gr DGS and DGX bullets at 2660 ft/s (810.8 m/s). The Double Tap gets 2825fps - 4700 ft./lbs. with a 270 grain Barnes TSX from a 23" bbl. Ruger 77 African.The.375 Rugers slightly greater case capacity, and the "short fat" cartridge efficiency lead to increases in the neighbourhood of 150 fps over the H&H cartridge. Their capabilities remain essentially comparable.