The .460 Rowland / 11.43×24mm is a rimless, straight walled handgun cartridge designed in 1997[1] by Johnny Rowland and developed in conjunction with Clark Custom Guns as a derivative of the .45 ACP[2] with the goal of producing a cartridge which can achieve true .44 Magnum[3] ballistic performance and be fired from a semi-automatic platform.
Like the .44 Magnum and its shorter parent case .44 Special, a firearm converted to .460 can still safely chamber and fire .45 ACP.
[4] Opinions vary greatly when dealing with animals heavier than 200 pounds, but generally speaking, the .460 Rowland is considered appropriate for most medium (e.g., deer) to large North American game (e.g., black bear, elk, etc), as its performance is equivalent to the .44 Magnum, especially with proper shot placement.
Full powered rifles are generally recommended;[5][6] the high muzzle energy and ability to use Spitzer style and more round nosed or pointed bullets result in desirable performance in important areas such as penetration and projectile mass retention.
[5] A weapon of reasonable performance is adequate, assuming the shooter is able to operate and maintain a level of marksmanship under duress.