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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.
Download as PDF; Printable version; In other projects ... Lists of gun cartridges (9 P) A. Action Express cartridges ... P. O. Ackley; Automatic Colt Pistol; B.
Based on the .25-35 Winchester and similar to the .25/35 Ackley Improved. Can also be made by necking-down.30-30. P.O. Ackley calls it "efficient and surprising". Performance with a 87-grain (5.6 g) bullet is approximately 3,100 ft/s (940 m/s) and with a 100-grain (6.5 g) bullet is approximately 2,650 ft/s (810 m/s). [12]
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.
Based on a .250 Savage case, the .22-250 is still one of the fastest shooting .22 caliber (5.56 mm) cartridges available. First offered in a factory firearm by Browning in 1963 (the first factory gun chambered for a wildcat), the .22-250 was later adopted by Remington as the .22-250 Remington. [13] [14].22 CHeetah. A .308 BR (Bench Rest) case ...
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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]