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The .375 H&H Magnum
The .375 H&H Magnum also known as .375 Holland & Holland Magnum is a medium-bore rifle cartridge introduced in 1912 by London based gunmaker Holland & Holland. The .375 H&H cartridge featured a belt to ensure the correct headspace, which otherwise might be unreliable, given the narrow shoulder of the cartridge case. The cartridge was designed to use cordite which was made in long strands – hence the tapered shape of the case, which, as a beneficial side effect also helped in smooth chambering and extraction from a rifle's breech.
The .375 H&H often is cited as one of the most useful all-round rifle cartridges, especially in shooting large and dangerous game. With bullet weights ranging from 270 grains to 350 grains, it has the necessary punch for small to medium game, as well as large, thick-skinned dangerous game. The most common bullet weight available in this caliber is 300 grains.
In many regions with thick-skinned dangerous game animals, the .375 H&H is seen as the minimum acceptable caliber, and in many places (primarily in Africa) it is now the legal minimum for hunting such game. African game guides, professional hunters, and dangerous game cullers have repeatedly voted the .375 H&H as their clear preference for an all-round caliber if they could have only one rifle. Alaskan game guides have expressed a similar preference for brown bear and polar bear country.
Unlike many other calibers, .375 H&H Magnum rifles achieve nearly the same point of impact over a wide range of bullet weights at all commonly used distances. This simplifies a hunter's choice in selecting different bullet weights, based upon the game hunted, by requiring fewer scope or sight adjustments, which further serves to popularize the .375 H&H Magnum among professional hunters.
When the .375 H&H Magnum was released in 1912 it was loaded with three bullet weights: a 235 gr at 2,800 ft/s, 270 gr at 2,650 ft/s and a 300 gr at 2,500 ft/s. However, today, with the availability of a wide range of powders, velocities gains of 150–200 ft/s can be realized. Acceptable bullet weights for the .375 H&H Magnum range from 200 gr to 380 gr. The lighter bullets, those weighing 210 gr to 235 gr are suitable for lighter plains game.
Bullets weighing between 250 gr to 285 gr can be used on heavy bodied plains game. Bullets weighing 285 gr to 300 gr should be reserved for heavy dangerous game. Today, a typical factory load such as Remington’s R375M1 or Federal’s ammunition will launch a 270 gr spitzer bullet at 2,690 feet per second with 4,337 ft⋅lbf of energy at the muzzle. This load has approximately the same trajectory as the 180-grain bullet from a .30-06 Springfield. However while the .30-06 generates only about 2,914 ft⋅lbf compared with the .375 H&H. The 270 gr spitzer bullet at .375 H&H velocities has a maximum point blank range (MPBR) of about 260 yd when sighted in at about 220 yd.
Ammunition loaded with the 300 gr or heavier bullet on the .375 H&H is adequate for heavy thick-skinned dangerous game such as elephant and rhinoceros in most conditions. Today, due to the pace at which hunting is conducted and the requirement of success within certain time constraints, the .375 H&H Magnum is considered under powered for class 4 game like elephant, rhinoceros and buffalo as the only shooting situation that might present itself might be an adverse one.
However, there is little doubt that it has been successfully used to take these heavy dangerous game species. There is some speculation that the .375 H&H Magnum has been used to take more Big Five game than any other cartridge. Even today, many professional hunters, outfitters and wildlife management personnel in Africa continue to rely on the .375 H&H Magnum to carry out their duties throughout the continent. There are a great number of rifles (and even a few handguns, such as adapted Howdah pistols) chambered for the .375 H&H. Many types of actions are used, including single-shots, double-rifles, and bolt actions. When hunting dangerous game, a double-rifle or a controlled-feed bolt-action rifle is most commonly recommended, as a quick follow-up shot may be necessary, and reliability of the firearm becomes of paramount importance. The one sport in which the .375 H&H Magnum has made some gains in has been the Big Bore Shoots such as those sponsored by the Big Bore Association of South Africa and its affiliated chapters. The .375 H&H Magnum is considered a transitional bore by the association and the minimum cartridge which is allowable for score keeping.
The 9.3×64mm Brenneke cartridge is the closest European continental ballistic twin of the .375 Holland & Holland Magnum. When compared to the .375 Holland & Holland Magnum the 9.3×64mm Brenneke uses a bullet of a slightly smaller diameter of .366 in versus the .375 H&H which uses a .375 in bullet a difference of only .009 in.
The .375 H&H Magnum also known as .375 Holland & Holland Magnum is a medium-bore rifle cartridge introduced in 1912 by London based gunmaker Holland & Holland. The .375 H&H cartridge featured a belt to ensure the correct headspace, which otherwise might be unreliable, given the narrow shoulder of the cartridge case. The cartridge was designed to use cordite which was made in long strands – hence the tapered shape of the case, which, as a beneficial side effect also helped in smooth chambering and extraction from a rifle's breech.
The .375 H&H often is cited as one of the most useful all-round rifle cartridges, especially in shooting large and dangerous game. With bullet weights ranging from 270 grains to 350 grains, it has the necessary punch for small to medium game, as well as large, thick-skinned dangerous game. The most common bullet weight available in this caliber is 300 grains.
In many regions with thick-skinned dangerous game animals, the .375 H&H is seen as the minimum acceptable caliber, and in many places (primarily in Africa) it is now the legal minimum for hunting such game. African game guides, professional hunters, and dangerous game cullers have repeatedly voted the .375 H&H as their clear preference for an all-round caliber if they could have only one rifle. Alaskan game guides have expressed a similar preference for brown bear and polar bear country.
Unlike many other calibers, .375 H&H Magnum rifles achieve nearly the same point of impact over a wide range of bullet weights at all commonly used distances. This simplifies a hunter's choice in selecting different bullet weights, based upon the game hunted, by requiring fewer scope or sight adjustments, which further serves to popularize the .375 H&H Magnum among professional hunters.
When the .375 H&H Magnum was released in 1912 it was loaded with three bullet weights: a 235 gr at 2,800 ft/s, 270 gr at 2,650 ft/s and a 300 gr at 2,500 ft/s. However, today, with the availability of a wide range of powders, velocities gains of 150–200 ft/s can be realized. Acceptable bullet weights for the .375 H&H Magnum range from 200 gr to 380 gr. The lighter bullets, those weighing 210 gr to 235 gr are suitable for lighter plains game.
Bullets weighing between 250 gr to 285 gr can be used on heavy bodied plains game. Bullets weighing 285 gr to 300 gr should be reserved for heavy dangerous game. Today, a typical factory load such as Remington’s R375M1 or Federal’s ammunition will launch a 270 gr spitzer bullet at 2,690 feet per second with 4,337 ft⋅lbf of energy at the muzzle. This load has approximately the same trajectory as the 180-grain bullet from a .30-06 Springfield. However while the .30-06 generates only about 2,914 ft⋅lbf compared with the .375 H&H. The 270 gr spitzer bullet at .375 H&H velocities has a maximum point blank range (MPBR) of about 260 yd when sighted in at about 220 yd.
Ammunition loaded with the 300 gr or heavier bullet on the .375 H&H is adequate for heavy thick-skinned dangerous game such as elephant and rhinoceros in most conditions. Today, due to the pace at which hunting is conducted and the requirement of success within certain time constraints, the .375 H&H Magnum is considered under powered for class 4 game like elephant, rhinoceros and buffalo as the only shooting situation that might present itself might be an adverse one.
However, there is little doubt that it has been successfully used to take these heavy dangerous game species. There is some speculation that the .375 H&H Magnum has been used to take more Big Five game than any other cartridge. Even today, many professional hunters, outfitters and wildlife management personnel in Africa continue to rely on the .375 H&H Magnum to carry out their duties throughout the continent. There are a great number of rifles (and even a few handguns, such as adapted Howdah pistols) chambered for the .375 H&H. Many types of actions are used, including single-shots, double-rifles, and bolt actions. When hunting dangerous game, a double-rifle or a controlled-feed bolt-action rifle is most commonly recommended, as a quick follow-up shot may be necessary, and reliability of the firearm becomes of paramount importance. The one sport in which the .375 H&H Magnum has made some gains in has been the Big Bore Shoots such as those sponsored by the Big Bore Association of South Africa and its affiliated chapters. The .375 H&H Magnum is considered a transitional bore by the association and the minimum cartridge which is allowable for score keeping.
The 9.3×64mm Brenneke cartridge is the closest European continental ballistic twin of the .375 Holland & Holland Magnum. When compared to the .375 Holland & Holland Magnum the 9.3×64mm Brenneke uses a bullet of a slightly smaller diameter of .366 in versus the .375 H&H which uses a .375 in bullet a difference of only .009 in.