In reality, Holland & Holland addd the belt as a secure means of headspacing the round, not trusting the rather shallow, 8 0 30’ shoulder angle to do the job.Īs for pressure, certainly the 375 H&H contains a good bit of it. Most shooters, for instance, labor under the assumption that the belt somehow strengthens the case against all the incredible power that it’s magnum load of powder must surely produce. But man, what a difference that makes!Īssumptions were and still are a big part of the 375 H&H Magnum belted case and its numerous offspring. Even at 30-06-action length, the 257 Weatherby is considered an overbore round. Roy may not have shortened his 257 magnum to fit common actions so much as to balance capacity with the slow burning powders of the day, which weren't all that slow by today's standards. But more rifles were manufactured with 30-06-length actions. The 375 H&H-based case in 1944 was the most readily available brass with a wider body and thus more powder capacity than the 30-06. The family resemblance may not be immediately evident - until you check that belt. Roy grabbed a handful and began reshaping… It was simply the 300 H&H under an assumed name.
Winchester made it easy on Roy by manufacturing a cartridge it called the Winchester Super 30. Back in 1944 the belted 300 H&H and and its parent 375 H&H case were the largest, most readily available centerfire cases from which to concoct new cartridges. Shooting innovator and wildcatter Roy Weatherby found his 257 Weatherby Magnum where he found most of his hyper-drive cases - hiding in a 300 H&H Magnum case.
But that’s not the reason you might want to shoot one.
Yes, the old geezer is still fastest! Roy Weatherby once shot a cape buffalo with one. The under-appreciated 257 Weatherby Magnum has been the heavyweight champ of the lightweight quarter-bore shooting world for 75 years.
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