.45 Super
| .45 Super | ||||||||||||||||||||||||
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| Type | Pistol | |||||||||||||||||||||||
| Place of origin | United States | |||||||||||||||||||||||
| Production history | ||||||||||||||||||||||||
| Designer | Dean Grennell | |||||||||||||||||||||||
| Designed | 1988 | |||||||||||||||||||||||
| Produced | 1988–present | |||||||||||||||||||||||
| Specifications | ||||||||||||||||||||||||
| Parent case | .451 Detonics Magnum | |||||||||||||||||||||||
| Case type | Rimless, straight | |||||||||||||||||||||||
| Bullet diameter | .451 in (11.5 mm) | |||||||||||||||||||||||
| Neck diameter | .473 in (12.0 mm) | |||||||||||||||||||||||
| Base diameter | .476 in (12.1 mm) | |||||||||||||||||||||||
| Rim diameter | .480 in (12.2 mm) | |||||||||||||||||||||||
| Rim thickness | .049 in (1.2 mm) | |||||||||||||||||||||||
| Case length | .898 in (22.8 mm) | |||||||||||||||||||||||
| Overall length | 1.275 in (32.4 mm) | |||||||||||||||||||||||
| Case capacity | 25 gr H2O (1.6 cm3) | |||||||||||||||||||||||
| Rifling twist | 1 in 16 in (406 mm) | |||||||||||||||||||||||
| Primer type | Large pistol | |||||||||||||||||||||||
| Maximum pressure ([[small arms ammunition pressure testing|]]) | 28,000 psi (190 MPa) | |||||||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||||||
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| Test barrel length: 5 inches (130 mm) Source: MidwayUSA | ||||||||||||||||||||||||
The .45 Super / 11.5x22mm is a smokeless center fire metallic cartridge developed in 1988 by Dean Grennell. Its external dimensions are identical to the .45 ACP/.45 ACP +P round, but it has a thicker internal case-wall, web-area and overall hardness of the cartridge case and is loaded to significantly higher pressures, which offers an average 300 feet per second (91 m/s) improvement in muzzle velocity. The cartridge was co-developed by Tom Fergerson and Ace Hindman.