Photo: The .375 H&H and also its .300 H&H offspring (far left) were too long to function well in standard-length action. Brass was shortened to do the .264 victory Mag, 7mm Rem Mag, .300 win Mag, .350 Norma Mag and also .458 victory Mag.

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No centerfire rifle cartridge has spawned a larger expanded family than Holland and also Holland’s 1912 introduction, the .375 H&H Magnum.

Contrary to renowned thought, this was not the an initial magnum cartridge, nor also the very first to stay a belt, i beg your pardon plays no function in make the magnum instance stronger.

Yeah, it’s fairly confusing.

Magnum is Latin for great. An artist’s best work is his magnum opus. In the 1700s, wine merchants started selling two-quart bottles as “magnums.” The first rifle cartridge come be labeled a magnum walk not organize two quarts of powder. It was the British make .500/.450 3 1/4-inch Magnum refer unleashed at some time in the 1870s.

In 1909, Westley Richards come out v its .425 Westley Richards Magnum. Neither had a belt. Yet Holland & Holland’s .400/.375 Belted Nitro express in 1905 did. It, however, to be not called a magnum.

Few shooters recognize that the original .375 H&H Magnum was available with a belt and also without. The beltless Flanged Magnum to be designed to role in break-action solitary and twin barrels wherein the flange, the very same as a rim on American situations like the .30-30 Winchester, was used for confident headspacing.

Because flanged cartridges didn’t flow smoothly with Mauser-style, stacked-magazine bolt actions, the rim was removed and also that famous belt was included for hopeful headspacing.

Some case the .375 H&H to be originally dubbed the Belted Rimless Nitro-Express in England. Winchester dubbed it the Magnum end here, and also that title has stuck.

It occurred as an efficient medium- to large-game cartridge because that buffalo, lion and also tiger. This action down in bore size from larger rounds was made feasible by the boosted energies and low carbon fouling of the brand-new smokeless powders.

Not every hunter essential a dangerous-game rifle, yet H&H needed much more sales, therefore it lessened the neck the the .375 to do the world’s second belted magnum cartridge. And also if you think you recognize it, hang on. That was not the .300 H&H Magnum, but the .275 H&H Magnum the 1912. This was essentially the tantamount of today’s 7mm Remington Magnum or 7mm Weatherby Magnum, yet powders that the work couldn’t push the ring to their true potential.

Next, in the early on 1920s, come the H&H .240 Magnum Rimless, the .243 Winchester the its day. That shoved a 100-grain cartridge 2,900 fps.

The .300 version, initially labeled the at sight Thirty, didn’t debut till 1925. The bettered the popular .30-06 Springfield by around 150 fps. Holland and also Holland went on to make a .400 H&H Magnum, .465 H&H Magnum and, in 1955, another 6mm, the .244 Magnum, which took advantage of more recent American powders to wring an advertised 3,500 fps native a 100-grain bullet.

While these proper British breakthroughs are interesting, American execution of the .375 H&H mother situation are an ext familiar. Roy Weatherby acquired the magnum ball rolling in 1943 through a whole series of magnums based on the old H&H case. The very first was the iconic .270 Weatherby Magnum. The beat the old .270 Winchester by about 200 fps. To make this and also his .257 and also 7mm versions, Roy reduce the initial .300 H&H case from 2.850 inches come 2.549 inches, minimized wall taper and pushed front a “double radius” shoulder.

For his .300 version, Roy maintained the complete .300 H&H length. The .340 Wby didn’t hit the streets until 1962 after ~ Winchester had actually proved the value of the .338 caliber with its .338 win Mag the 1958 based, huge surprise, on the H&H case. Each new Weatherby set speed records and also helped settle the belted magnum mystique. Only freshly was the .300 Wby outclassed by the .300 Dakota, .300 Remington Ultra Mag and .30-378 Wby, all based on fatter cases.

With his improved case shape, Weatherby made the original .375 H&H the .375 Wby in 1945. It was superseded in 1953 by his .378 Wby based upon a larger case. In fact, all larger Weatherby calibers are based on this bigger case, therefore we’ll change to Winchester and Remington for an ext H&H family members developments.

Weatherby’s success inspired Winchester, which announced that is .458 victory Mag in 1956. Winchester shortened the .375 case to 2.5 customs so it would much more easily fit its design 70 and also Mauser armed forces actions then being converted to sporting use. This attractive customers that couldn’t bought the an ext expensive Weatherby cartridges.

Two year later, the .458 WM to be necked under to become the .338 WM and .264 WM. The .338 slowly ended up being a respected elk and huge bear round. The screaming .264 WM, a direct difficulty to the .257 Wby, was labeled the Westerner and took off immediately as a mountain rifle because that deer, elk and moose. Remington traction the rug from under that in 1962 with release that its an ext efficient 7mm RM, which can handle slightly more heavier bullets. Winchester countered through the .300 WM the next year, and the 2 slugged it out for a pair of decades. They remain two that the most well-known magnum rounds in the world, and also both owe your success to a parent born 50 years earlier.

Remington acquired really an imaginative in the mid 1960s through shortening the belted magnum situations to 2.17 inches and chambering them as the 6.5 RM and also .350 RM in short-barreled, quick taking care of carbines that never ever wrung full potential indigenous the cartridges. After ~ a hiatus, Remington announced one much more variation ~ above the .375 H&H theme, the full-length 8mm RM in 1978. While the compares ballistically come the .338 WM, it has never approached that is popularity. The 8mm RM to be necked under to .284 to become the 7mm Shooting times Westerner in 1989. That wasn’t known as a SAAMI manufacturing facility round until 1996, at which time it to be the faster commercial 7mm, hitting 3,400 fps through a 140-grain bullet. It to be dethroned as speed King in 2002 by the 7mm RUM.

The obscure 8mm RM has actually one final claim to fame. Remington necked it approximately .416 to make the .416 RM, a challenger come the .458 WM. The .416 RM attributes perfectly with the model 700 long activity and, in spite of its narrower, lighter bullet, retains much more energy downrange through a flatter trajectory.

While all this .375 H&H advance was churning, the Scandinavians at Norma weren’t sleep at the switch. Seeing a void, in 1959 they raised Winchester’s .338 WM bid through the .358 Norma Magnum. It was produced from a reduce .375 H&H instance with straighter walls and a cheater shoulder. The case was lengthened to do the .308 Norma Mag in 1960. The arrival of the .300 WM simply three years later on pretty much doomed the Norma version.

Norma in 1953 to be the first to produce factory ammunition because that the American wildcat 7x61mm Sharpe & Hart, however another modification of the basic H&H belted case. The S&H is just slightly shorter than the 7mm RM, which put it come pasture. That knows, if any American gun device had chambered the S&H in mass-produced rifles, the Remington version could never have actually been born.

Dozens much more wildcats have actually been carved from the .375 H&H, making that the hands-down champ because that inspiring brand-new cartridges. At the same time the initial remains the most famous .375 caliber in the civilization — not a negative history.

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This write-up was very first printed in the September 2011 version of GunHunter Magazine. Subscribe today to have actually GunHunter delivered to her home.