The .454 Casull was designed by Dick Casull and Jack Fullmer and introduced during the mid 1950's. For many years, the big .45 caliber cartridge was somewhat of a wildcat, but factory loaded ammunition is now available from Freedom Arms of Freedom Wyoming, the same company that manufactures the Casull single action revolvers in this caliber. Unprimed cases with small primer pockets and custom bullets with extremely thick jackets designed to withstand the tremendous stress they are subjected to when fired from the .454 at maximum velocities are also available from the firm. In the muzzle energy department, the .454 Magnum produces about 50 percent more punch than the .44 Remington Magnum. Of course, you'll find no free lunch here, the .454 churns up close to 70 percent more recoil than the .44 Magnum, or about the same as a .338 Winchester Magnumin a 10 pound shoulder fired rifle. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.

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