.451 Detonics Magnum

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The .451 Detonics Magnum, or simply the .451 Detonics, is a pistol cartridge similar to (but slightly longer than) the .45 ACP. It uses a reinforced case to handle higher pressure loads. Its parent case is the .45 Winchester Magnum (which is 30.4mm long), trimmed down to 0.942 inches (23.9 mm). It was deliberately made to be longer than the .45 ACP cartridge [11.43x23mm] to avoid accidental chambering and/or safety issues.

The cartridge was available with 185 grain (11.98 gram) and 200 grain (12.95 gram) bullets. Like both the .45 ACP and .45 Winchester Magnum, the .451 Detonics also utilizes a .452 caliber projectile.