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colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| .270 Weatherby Magnum colspan="3" style="text-align: center; font-size: 90%; border-bottom: 1px solid #aaa; line-height: 1.25em;"
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| 300px
.270 Weatherby 2nd from left Type Rifle / Hunting Place of origin USA colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Production history Designer Roy Weatherby Designed 1943 Manufacturer Weatherby colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Specifications Parent case .300 H&H Magnum Case type Belted, bottleneck Bullet diameter .277 in (Expression error: Unexpected < operator.
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 mm
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Neck diameter .303 in (Expression error: Unexpected < operator.
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 mm
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Shoulder diameter .492 in (Expression error: Unexpected < operator.
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 mm
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Base diameter .512 in (Expression error: Unexpected < operator.
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 mm
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Rim diameter .531 in (Expression error: Unexpected < operator.
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 mm
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Rim thickness .220 in (Expression error: Unexpected < operator.
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 mm
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Case length 2.55 in (Expression error: Unexpected < operator.
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 mm
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Overall length 3.25 in (Expression error: Unexpected < operator.
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 mm
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Rifling twist 1-10" Primer type Large rifle magnum colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Ballistic performance Bullet weight/type Velocity Energy style="vertical-align:middle; border-bottom: 1px dotted #aaa;
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" | 130 gr (Expression error: Unexpected < operator.
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Test barrel length: 26"
Source: Accurate Powder [1]

The .270 Weatherby Magnum was the first belted magnum based on the .300 H&H Magnum to be developed by Roy Weatherby. It has the characteristic double-radius shoulders and is necked down to accommodate the .277in bullets. Being a proprietary cartridge, the .270 Weatherby has no official SAAMI maximum pressure limit. Weatherby factory ammunition is loaded to 71,000 PSI.[1] The first Weatherby cartridge to be used in Africa was the .270 Weatherby on a jackal on June 8, 1948. [2]

PerformanceEdit

Given its higher pressure and larger case which holds more powder than the .270 Winchester, the .270 Weatherby has about 200 ft/s faster performance with any particular bullet weight. This performance comes at the cost of more recoil and barrel heat. In addition, a long barrel is necessary to take advantage of extra powder to gain maximum velocity. The cartridge is excellent at long-range hunting, but is not well suited to high-volume shooting such as varmint hunting.[3]

For those handloading their own cartridges, this is an easy round to load. It does best with full-power loads and is not well-suited for reduced loads. [3][4] Ed Weatherby, son of Roy Weatherby says that the .270 Weatherby is his favorite caliber. As he puts it, there just isn't a better long-range deer caliber. He goes on to mention that it is also quite effective for elk, and antelope.[2]

CategoriesEdit

Cartridge:rifles
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