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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.
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.
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]
Guns magazine, Dec 2000 by Charles E. Petty; Loading Wildcat Cartridges: a Few Simple Considerations Make Life Much Easier Guns magazine, August 2005 by Charles E. Petty; Wildcat Cartridges wildcat cartridge descriptions at The Reload Bench; Reloading Techniques: .22 Win. Magnum Rimfire Archived 2007-04-03 at the Wayback Machine, Performance ...
The shipping containers full of guns and ammunition were allegedly shipped from Long Beach through Hong Kong to North Korea by Wen and his unidentified co-conspirators, the U.S. Attorney's Office ...
The .280 Ackley Improved (.280 AI) was the result of the .280 Remington case modification by P.O Ackley, who pushed out the sidewalls at the shoulder to near parallel and steepened the shoulder angle to 40 degrees in order to increase powder capacity, thus along with increasing the allowable pressure, resulted in increasing the bullet initial velocity by approximately 100 fps.
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