Back .30-378 Weatherby Magnum Spanish .30-378 Weatherby Magnum NB .30-378 Weatherby Magnum Portuguese
| .30-378 Weatherby Magnum | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Left, with .300 Weatherby Magnum (center) and .30-06 | ||||||||||||||||
| Type | Rifle | |||||||||||||||
| Place of origin | USA | |||||||||||||||
| Production history | ||||||||||||||||
| Designer | Roy Weatherby | |||||||||||||||
| Designed | 1959 | |||||||||||||||
| Manufacturer | Weatherby Inc. | |||||||||||||||
| Produced | 1996 - Current | |||||||||||||||
| Variants | .30-.378 Magnum, .30/378 Arch, .30/378 Weatherby | |||||||||||||||
| Specifications | ||||||||||||||||
| Parent case | .378 Weatherby Magnum | |||||||||||||||
| Case type | belted magnum | |||||||||||||||
| Bullet diameter | .308 in (7.8 mm) | |||||||||||||||
| Neck diameter | .337 in (8.6 mm) | |||||||||||||||
| Shoulder diameter | .561 in (14.2 mm) | |||||||||||||||
| Base diameter | .582 in (14.8 mm) | |||||||||||||||
| Rim diameter | .579 in (14.7 mm) | |||||||||||||||
| Case length | 2.913 in (74.0 mm) | |||||||||||||||
| Overall length | 3.690 in (93.7 mm) | |||||||||||||||
| Case capacity | 133 gr H2O (8.6 cm3) | |||||||||||||||
| Rifling twist | 1 in 10 in (250 mm) | |||||||||||||||
| Primer type | Large rifle magnum | |||||||||||||||
| Maximum pressure | 63,817 psi (440.00 MPa) | |||||||||||||||
| Ballistic performance | ||||||||||||||||
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| Test barrel length: 26" (660 mm) Source(s): Weatherby [1] | ||||||||||||||||
The .30-378 Weatherby Magnum is a .30 caliber, belted, bottle-necked rifle cartridge.[2] The cartridge was developed in response to a US Army military contract in 1959. While still unreleased to the public, the cartridge went on to set world records for accuracy including the first ten 10X in 1,000 yards (910 m) benchrest shooting.[3] It is currently the highest velocity .30 caliber factory ammunition available.
- ^ "Ammo info at Weatherby". Archived from the original on 2006-11-10. Retrieved 2006-12-23.
- ^ Hawks, Chuck (2002). "The .300 Super Magnums". chuckhawks.com. Guns and Shooting Online. Retrieved November 24, 2013.
- ^ Barnes, Frank c. (2012). Cartridges of the World 13Ed. Iola WI: F+W Media Inc. ISBN 978-1-4402-3059-2.