The .454 Casull 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.
