.454 Casull

.454 Casull
.454 Casull FMJ (full metal jacket bullet) round
Type	Handgun
Place of origin	United States
Production history
Designer	Dick Casull, Jack Fullmer
Designed	1958
Specifications
Parent case	.45 Colt
Case type	Rimmed straight
Bullet diameter	.452 in (11.5 mm)
Neck diameter	.480 in (12.2 mm)
Base diameter	.480 in (12.2 mm)
Rim diameter	.512 in (13.0 mm)
Rim thickness	.057 in (1.4 mm)
Case length	1.383 in (35.1 mm)
Overall length	1.77 in (45 mm)
Primer type	Boxer Small rifle
Ballistic performance
Bullet mass/type Velocity Energy 240 gr (16 g) XTP Hornady 1,900 ft/s (580 m/s) 1,923 ft·lbf (2,607 J) 300 gr (19 g) JSP Cor-Bon 1,650 ft/s (500 m/s) 1,814 ft·lbf (2,459 J) 335 gr (22 g) HC Cor-Bon 1,550 ft/s (470 m/s) 1,788 ft·lbf (2,424 J) 360 gr (23 g) WFNGC DoubleTap 1,500 ft/s (460 m/s) 1,800 ft·lbf (2,400 J) 400 gr (26 g) WFNGC DoubleTap 1,400 ft/s (430 m/s) 1,741 ft·lbf (2,360 J)
Test barrel length: 7.5 in Source(s): Hornady DoubleTap

The .454 Casull (/kə'sul/) is a firearm cartridge, developed as a wildcat cartridge in 1957 by Dick Casull and Jack Fullmer. It was first announced in November 1959 by Guns & Ammo magazine. The basic design was a lengthened and structurally improved .45 Colt case. The wildcat cartridge finally went mainstream in 1997, when Ruger began chambering its Super Redhawk in this caliber. Taurus followed with the Raging Bull model in 1998 and the Taurus Raging Judge Magnum in 2010. The .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 relationship between .38 Special and .357 Magnum cartridges as well as the .44 Special and .44 Magnum cartridges).

The .454 Casull was finally commercialized in 1998, when SAAMI published its first standards for the cartridge. 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 the rifle primer has a significantly stronger cup than a pistol primer.

The round is one of the most powerful handgun cartridges in production. The .454 Casull generates almost 5 times the recoil of the .45 Long Colt, and about 75% more recoil energy than the .44 Magnum. It can deliver a 250 grain (16 g) bullet with a muzzle velocity of over 1,900 feet per second (580 m/s), developing up to 2,000 ft-lb (2.7 kJ) of energy from a handgun. One Buffalo Bore loading drives a heavier 300 grain JFN bullet at 1,650 ft/s for 1,813 ft-lb of muzzle energy. The .454 Casull round is primarily intended for hunting medium or large game, metallic silhouette shooting, and bear protection.