| .45 Super | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Pistol | |||||||||||||||
| Place of origin | United States | |||||||||||||||
| Production history | ||||||||||||||||
| Designer | Dean Grennell | |||||||||||||||
| Designed | 1988 | |||||||||||||||
| Produced | 1988–present | |||||||||||||||
| Specifications | ||||||||||||||||
| Parent case | .451 Detonics Magnum[1] | |||||||||||||||
| 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) | |||||||||||||||
| Primer type | Large pistol | |||||||||||||||
| Maximum pressure | 28,000 psi (190 MPa) | |||||||||||||||
| Ballistic performance | ||||||||||||||||
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| Test barrel length: 5 inches (130 mm) Source(s): MidwayUSA | ||||||||||||||||
The .45 Super / 11.5x22mm is a powerful smokeless powder center fire metallic firearm cartridge developed in 1988 by Dean Grennell, a well-known writer in the firearms field as well as managing editor of Gun World magazine.[2][3] It is dimensionally similar to the .45 ACP round but has a thicker case wall and is loaded to higher pressures, which offers an average 300 feet per second (91 m/s) improvement in muzzle velocity over the .45 ACP.[4] The cartridge was co-developed by Tom Fergerson and Ace Hindman.[5]