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Parker Otto Ackley (May 25, 1903 – August 23, 1989) [1] was an American gunsmith, barrel maker, author, columnist, and wildcat cartridge developer. The Ackley Improved family of wildcat cartridges are designed to be easily made by rechambering existing firearms, and fireforming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity.
Olympic was the first in the industry to offer AR-15-style firearms in 9×19mm and .45 ACP, 10mm Auto, 7.62×39mm, and the Winchester Super Short Magnum cartridges. [1] In late 1987, the company purchased Phoenix, Arizona-based M-S Safari Arms, adding the M1911 pistol to its lineup under the name Safari Arms. By January 2004, all 1911-style ...
P.O. Ackley was a notable gunsmith famous for developing wildcat cartridges from parent cartridges like the 30-06 Springfield. For many of the wildcats listed above, and several of standardized commercial chamberings based on the 30-06 cartridge, there are "Ackley Improved" versions with sharper shoulders increasing case capacity. [25]
ICL cartridges (ICL stands for Increased Case Load) are rare hunting wildcat cartridges developed by Arnold & Vern Juenke, [2] gunsmiths who owned Saturn Gun Works in Reno, Nevada. ICL cartridges are wildcats based on conventional cases in use at the time.
The .375 H&H Ackley Improved was a cartridge designed by P. O. Ackley in an effort improve on the performance and case life of the .375 H&H Magnum. The improved case follows the formulaic Ackley design of a body of little taper and steep shoulder of 40°. The cartridge was found to be capable of 2,830 ft/s (860 m/s) with a 270 gr (17 g) bullet.
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. The result was a small ...
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One of P.O. Ackley's earliest wildcats was the 7mm-06 Improved, which was made by necking down the .30-06 Springfield case and fire-forming it to have less body taper and a 40-degree shoulder angle. Soon after the .280 Remington came out, Fred Huntington reformed its case to an improved configuration with minimum body taper, a 35-degree ...