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colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| .300 Winchester Short Magnum Type Rifle Place of origin USA colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Production history Designer Winchester Repeating Arms Company Manufacturer Winchester Produced 2001 colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Specifications Bullet diameter .308 in (Expression error: Unexpected < operator.
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 mm
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Neck diameter .344 in (Expression error: Unexpected < operator.
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 mm
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Shoulder diameter .538 in (Expression error: Unexpected < operator.
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Base diameter .555 in (Expression error: Unexpected < operator.
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 mm
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Rim diameter .535 in (Expression error: Unexpected < operator.
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Case length 2.100 in (Expression error: Unexpected < operator.
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 mm
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Overall length 2.860 in (Expression error: Unexpected < operator.
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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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" | 150 gr (Expression error: Unexpected < operator.
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"|3,313 ft/s (Expression error: Unexpected < operator.
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" | 165 gr (Expression error: Unexpected < operator.
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Test barrel length: 24"
Source: Reloading data at Accurate Powder

.300 Winchester Short Magnum (also known as .300 WSM, commonly pronounced as "Whizzum") is a .308 caliber short magnum cartridge that was introduced in 2001 by Winchester Repeating Arms Company.[1] The cartridge overall length is 72.64mm, cartridge case is 53.34mm in length and the bullet diameter is 7.84mm.

Use & PerformanceEdit

.300 WSM is used in the Western United States for elk, mule deer, and whitetail and on the plains, where long range shooting is a must. Also, although relatively new, the 300 WSM has already had some success in benchrest shooting. [2] [3]

The .300 WSM is a Delta L problem cartridge, meaning it can present unexpected chambering and/or feeding problems. The Delta L problem article explains this problem in more detail.

Muzzle velocityEdit

  • 10.69 g (165 gr) Full Metal Jacket(FMJ): 3,125 ft/s
  • 11.66 g (180 gr) Full Metal Jacket(FMJ): 2,970 ft/s

ComparisonEdit

.300 WSM performance comparisons [4]
Cartridge Bullet Weight Muzzle velocity Muzzle energy
.300 WSM 200 2822 3538
.300 RSAUM 200 2790 3458
.300 Win Mag 200 2700 3238
.300 Wby Mag 200 2987 3963
.300 RUM 200 3154 4419



CategoriesEdit

Cartridge:rifles
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