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The 7×57mm Mauser Ackley Improved is an alternate version of the 7×57mm Mauser cartridge with 40 degree shoulder. This wildcat was designed to be easily made by rechambering existing firearms, and fire forming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity with the trade-off of a smaller ...
.338-06 Ackley Improved, an improved .338-06 A-Square (which is a .30-06 necked up to .338 caliber).348 Ackley improved, an improved .348 Winchester which gets about 200 feet a second more velocity over the standard..35 Ackley Magnum No. 1 and No. 2 short, based on the .30 Ackley Magnum cases; there is also an Improved version of the No. 2.
In C.I.P. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum C.I.P. pressure to certify for sale to consumers. [3] This means that 7.92×57mm Mauser chambered arms in C.I.P. regulated countries are currently (2013) proof tested at 487.50 MPa (70,706 psi) PE piezo pressure.
The Peters Cartridge Company was a company located along the Little Miami River in Kings Mills, Ohio, which specialized in gunpowder and ammunition production. Founded in 1887 by Gershom Moore Peters, the company supplied military ammunition to various countries during both world wars.
Three non-bottlenecked cartridges (9×19mm Parabellum, .40 S&W and .45 ACP) on the left, three bottlenecked cartridges (FN 5.7×28mm, 5.56×45mm NATO and .300 Winchester Magnum) in the center, and two polymer-cased 12-gauge shotshells on the right
The .17 Hornet / 4.4x34mmR is a .17 caliber centerfire rifle cartridge originally offered as a "wildcat cartridge" developed by P.O. Ackley in the early 1950s. He created this non-factory (wildcat) offering by simply necking-down the .22 Hornet to .17 caliber and fire-forming the resized cases in his new chamber design.
Since cases for the .280 RCBS could be formed by firing .280 Remington ammo in a rifle chambered for the former, Ackley abandoned the 7mm-06 Improved and started chambering rifles for the .280 RCBS. He then changed the 35-degree shoulder to 40-degrees and the .280 Ackley wildcat was born.
Caliber/calibre: In small arms, the internal diameter of a firearm's barrel or a cartridge's bullet, usually expressed in millimeters or hundredths of an inch; in measuring rifled barrels this may be measured across the lands (.303 British) or grooves (.308 Winchester) or; a specific cartridge for which a firearm is chambered, such as .45 ACP or .357 Magnum.