| .300 Remington Short Action Ultra Magnum | ||||||||||||||||||||
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| Type | Rifle | |||||||||||||||||||
| Place of origin | USA | |||||||||||||||||||
| Production history | ||||||||||||||||||||
| Designer | Remington | |||||||||||||||||||
| Manufacturer | Remington | |||||||||||||||||||
| Produced | 2001 | |||||||||||||||||||
| Specifications | ||||||||||||||||||||
| Parent case | .300 Remington Ultra Magnum | |||||||||||||||||||
| Case type | rimless bottleneck | |||||||||||||||||||
| Bullet diameter | .308 in (7.8 mm) | |||||||||||||||||||
| Neck diameter | .344 in (8.7 mm) | |||||||||||||||||||
| Shoulder diameter | .534 in (13.6 mm) | |||||||||||||||||||
| Base diameter | .550 in (14.0 mm) | |||||||||||||||||||
| Rim diameter | .534 in (13.6 mm) | |||||||||||||||||||
| Case length | 2.015 in (51.2 mm) | |||||||||||||||||||
| Overall length | 2.825 in (71.8 mm) | |||||||||||||||||||
| Rifling twist | 1-10 in (250 mm) | |||||||||||||||||||
| Primer type | Large rifle magnum | |||||||||||||||||||
| Maximum pressure (SAAMI) | 65,000 psi (450 MPa) | |||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||
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| Test barrel length: 24 in (610 mm) Source(s): Reloading data at Accurate Powder | ||||||||||||||||||||
.300 Remington Short Action Ultra Magnum (also known as 300 RSAUM, 300 RSUM or 300 Rem SAUM) is a .30 caliber short magnum cartridge that is a shortened version of the Remington 300 Ultra Mag, both of which derive from the .404 Jeffery case. The Remington Short Ultra Mag was put on the market shortly after Winchester released its 300 WSM round in 2001, resulting in the Winchester product getting the marketing advantage that has eclipsed the Remington offering.[1]