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.44 AMP (uses the .44 Magnum bullet).357 AMP (uses the .357 Magnum bullet).300 AMP (uses the .30 Carbine bullet; necked down at a different shoulder angle than the .30 LMP).45 Win Mag.45 ACP (experimental only).475 Auto Mag (experimental only, uses the .475 Wildey Magnum bullet) Lee Jurras.41 JMP (Uses the .41 Magnum bullet) Kent Lomont
The .44 Auto Magnum Pistol (AMP) is a large-caliber, semi-automatic pistol cartridge developed in 1971 by Harry Sanford. [2] The primary use is in the Auto Mag Pistol . [ 3 ] The cartridge was also employed in the Wildey automatic pistol, including a few other custom pistols. [ 4 ]
Despite the ".44" designation, guns chambered for the .44 Magnum round, its parent case, the .44 Special, and the .44 Special's parent case, the .44 Russian all use 0.429 in (10.9 mm) diameter bullets. [3] The .44 Magnum is based on the .44 Special case but lengthened and loaded to higher pressures for greater velocity and energy.
The most well-known is the .44 Magnum which uses a 0.429 to 0.430 inch diameter bullet, depending on jacket or cast. Though less common than the smaller .38 caliber family of cartridges, the caliber is popular with many shooters and the .44 Magnum in particular facilitated the rise of handgun hunting .
The pistol is offered with a choice of either single-action or double-action trigger mechanisms. Barrels are currently available in 8 in (203 mm), 10 in (254 mm) or 12 in (305 mm) lengths. [ 11 ] Other lengths of 5 in (127 mm), 6 in (152 mm), 7 in (178 mm) and 14 in (356 mm) have been discontinued. [ 12 ]
Although not originally designed for handguns, several rifle and shotgun cartridges have also been chambered in a number of large handguns, primarily in revolvers like the Phelps Heritage revolver, Century Arms revolver, Thompson/Centre Contender break-open pistol, Magnum Research BFR, and the Pfeifer Zeliska revolvers.
v 0 is difficult to measure, so a second concept has been developed in ballistic testing called the ballistic limit (v 50). This is the velocity at which 50 percent of the shots go through and 50 percent are stopped by the armor. US military standard MIL-STD-662F V50 Ballistic Test define a commonly used procedure for this measurement.
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.