A .454 Casull full metal jacket round.
|Place of origin||United States|
|Designer||Dick Casull, Jack Fullmer|
|Parent case||.45 Colt|
|Case type||Rimmed straight|
|Bullet diameter||.452 in (Script error mm)|
|Neck diameter||.480 in (Script error mm)|
|Base diameter||.480 in (Script error mm)|
|Rim diameter||.512 in (Script error mm)|
|Rim thickness||.057 in (Script error mm)|
|Case length||1.383 in (Script error mm)|
|Overall length||1.77 in (Script error mm)|
|Primer type||Boxer Small rifle|
|240 gr (Script error g) XTP JHP||1,900 ft/s (Script error m/s)||1,923 ft·lbf (Script error J)|
|300 gr (Script error g) XTP JHP||1,650 ft/s (Script error m/s)||1,814 ft·lbf (Script error J)|
|335 gr (Script error g) WFNGC HC||1,600 ft/s (Script error m/s)||1,904 ft·lbf (Script error J)|
|360 gr (Script error g) WFNGC HC||1,500 ft/s (Script error m/s)||1,800 ft·lbf (Script error J)|
|400 gr (Script error g) WFNGC HC||1,400 ft/s (Script error m/s)||1,741 ft·lbf (Script error J)|
| Test barrel length: 7.5 in|
Source(s): Hornady  DoubleTap
It was first announced in November 1959 by Guns & Ammo magazine. The basic design was a lengthened and structurally improved .45 Colt case. .45 Schofield and .45 Colt cartridges can fit into the .454's chambers, but not the other way around because of the lengthened case (very similar to the way .38 Special cartridges can fit into the longer chambers of a .357 Magnum and .44 Special cartridges can fit into the longer chambers of a .44 Magnum).
The new Casull round uses a small rifle primer rather than a pistol primer, because it develops extremely high chamber pressures of over 60,000 CUP (copper units of pressure) (410 MPa), and has a significantly stronger cup than a pistol primer. The .454 Casull is one of the most powerful handgun cartridges in production. It can deliver a 250 grain (16 g) bullet with a muzzle velocity of over 1,900 feet per second (580 m/s), developing more than 2,000 ft-lb (2.7 kJ) of energy, although energy levels from common .454 revolvers with 7–8 inch barrels are typically somewhat lower (1,600–1,700 ft·lbf). The round is primarily intended for hunting medium game, metallic silhouette shooting and predator defense.
The cartridges were originally loaded with a triplex load of propellants, which gave progressive burning, aided by the rifle primer ignition, resulting in a progressive acceleration of the bullet as it passed up the barrel. The first commercially available revolver chambered in .454 Casull was made by Freedom Arms in 1983 as a five-shot revolver.
The recently introduced .460 Smith and Wesson Magnum cartridge has the same diameter as a .45 Colt or .454 Casull, and therefore revolvers chambered for it will also chamber the .454 Casull, .45 Colt, and .45 Schofield.
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