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In the case of the .45 ACP, the new standard cartridge pressure is 21,000 psi (145 MPa) and the SAAMI .45 ACP +P standard is 23,000 psi (159 MPa). This is a common practice for updating older cartridges to match the better quality of materials and workmanship in modern firearms.
It is essentially a .45 ACP case, necked down to .357, resulting in a cartridge similar in form to the earlier 7.65×21mm Parabellum and 7.63×25mm Mauser cartridges. It was created to be a low recoil target cartridge that would function reliably with multiple bullet types, FMJ to cast lead wadcutters without the feeding problems that straight walled pistol rounds sometimes exhibit. [2]
Barrel length: 5 inches (127mm) ... The Kimber Eclipse is a model 1911 semi-automatic pistol chambered for the .45 ACP and 10mm ... with a five-inch barrel, and is ...
To rule out such a dangerous possibility, Grennell chose to use brass formed from the stronger and more modern .451 Detonics, [1] shortened to the overall length of the .45 ACP design. [2] Support for the case head was also addressed by adopting a new chamber and barrel design which supports the base area of the case. [6]
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.
The .45 GAP (Glock Auto Pistol) or .45 Glock (11.43×19mmRB) is a pistol cartridge designed by Ernest Durham, an engineer with CCI/Speer, at the request of firearms manufacturer Glock to provide a cartridge that would equal the power of the .45 ACP, have a stronger case head to reduce the possibility of case neck blowouts, and be shorter to fit in a more compact handgun.
The .45 Winchester Magnum case is redrawn with thicker walls and longer case. The thicker wall dimensions of the .45 Winchester Magnum are designed to accommodate a higher internal pressure (40,000 cup ) than that of the .45 ACP (18,000 cup [21,000psi or 140MPa]).
A pistol cartridge which headspaces off the case mouth, e.g. .45 ACP. In firearms, headspace is the distance measured from a closed chamber's breech face to the chamber feature that limits the insertion depth of a cartridge placed in it. Used as a verb by firearms designers, headspacing refers to the act of stopping deeper cartridge insertion.