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colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| .257 Weatherby Magnum colspan="3" style="text-align: center; font-size: 90%; border-bottom: 1px solid #aaa; line-height: 1.25em;"
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| 320px
Type Rifle 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 1944 Manufacturer Weatherby Produced 1944-Present colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Specifications Parent case .300 H&H Magnum Bullet diameter .257 in (Expression error: Unexpected < operator.
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 mm
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Neck diameter .288 in (Expression error: Unexpected < operator.
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 mm
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Shoulder diameter .496 in (Expression error: Unexpected < operator.
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 mm
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Base diameter .514 in (Expression error: Unexpected < operator.
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 mm
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Rim diameter .534 in (Expression error: Unexpected < operator.
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 mm
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Case length 2.560 in (Expression error: Unexpected < operator.
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 mm
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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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" | 87 gr (Expression error: Unexpected < operator.
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" | 100 gr (Expression error: Unexpected < operator.
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Source: Weatherby [1]

The .257 Weatherby Magnum was introduced as a wildcat during the mid 1940s when Roy Weatherby was building custom rifles around war surplus '03 Springfield and the '98 Mauser actions. It was always his favorite cartridge.

The .257 Weatherby Magnum cartridge case itself a shortened version of the .300 H&H Magnum case necked down to .257 caliber and blown out the full length of the case which then sports a double radius shoulder and shortened to 2.545" with a long neck.

The 257 Weatherby Magnum is an extremely flat-shooting dual-purpose cartridge and is the fastest of all commercially available 25 caliber cartridges, sending a 75 grain bullet out the muzzle at 3,900 feet per second (1,190 m/s) for varmints and able to send a 115 grain bullet out the muzzle at 3,400 feet per second (1,040 m/s) for deer sized game. It is well suited for plains hunting and other areas where very long range shooting is expected.

CategoriesEdit

Cartridge:rifles
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