.458 Lott
| .458 Lott | ||||||||||||||||||||||||
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.458 Lott, its parent case the .375 H&H Magnum and the .458 Winchester Magnum for comparison. | ||||||||||||||||||||||||
| Type | Rifle | |||||||||||||||||||||||
| Place of origin | United States | |||||||||||||||||||||||
| Production history | ||||||||||||||||||||||||
| Designer | Jack Lott | |||||||||||||||||||||||
| Designed | 1971 | |||||||||||||||||||||||
| Manufacturer | A-Square | |||||||||||||||||||||||
| Produced | 1989–present | |||||||||||||||||||||||
| Variants | .458 Lott Improved, .450 Watts Magnum, .450 Ackley Magnum | |||||||||||||||||||||||
| Specifications | ||||||||||||||||||||||||
| Parent case | .375 H&H Magnum | |||||||||||||||||||||||
| Case type | Belted, straight | |||||||||||||||||||||||
| Bullet diameter | .458 in (11.6 mm) | |||||||||||||||||||||||
| Neck diameter | .481 in (12.2 mm) | |||||||||||||||||||||||
| Base diameter | .513 in (13.0 mm) | |||||||||||||||||||||||
| Rim diameter | .532 in (13.5 mm) | |||||||||||||||||||||||
| Rim thickness | .050 in (1.3 mm) | |||||||||||||||||||||||
| Case length | 2.800 in (71.1 mm) | |||||||||||||||||||||||
| Overall length | 3.600 in (91.4 mm) | |||||||||||||||||||||||
| Case capacity | 110 gr H2O (7.1 cm3) | |||||||||||||||||||||||
| Rifling twist | 1-14 in | |||||||||||||||||||||||
| Primer type | Large Rifle (Magnum) | |||||||||||||||||||||||
| Maximum pressure | 62,500 psi (431 MPa) | |||||||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||||||
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The .458 Lott is a .458 caliber rifle cartridge designed for the purpose of hunting large, thick-skinned dangerous game animals in Africa. It is based on the full length .375 H&H Magnum case blown out and shortened to 2.800 inches (71.1 mm).
The .458 Lott was designed in response to perceived inadequacies and problems encountered with the .458 Winchester Magnum. The cartridge provides a distinct step up in performance over the .458 Winchester Magnum. A-Square, Česká Zbrojovka/Brno, Hornady, and Ruger have been instrumental in the cartridge's rise in popularity.