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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.
Kimber Manufacturing is an American company that designs, manufactures, and distributes small arms such as M1911 pistols, Solo pistols, rifles, and revolvers. The USA Shooting Team , Marines assigned to Special Operations Command , and the LAPD SWAT team [ 1 ] have used Kimber pistols in the past.
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.
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.
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Donald Trump greets his campaign manager Susie Wiles during an election night event at the West Palm Beach Convention Center in West Palm Beach, Florida, on November 6, 2024.
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The .280 British was an experimental rimless bottlenecked intermediate rifle cartridge. It was later designated 7 mm MK1Z , and has also been known as .280/30 , .280 Enfield , 7 mm FN Short and 7×43mm .