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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.
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.
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.
Currently (2011) none of the major commercial ammunition manufacturers offer factory loaded 6.5-06 A-Square ammunition. There are smaller companies that custom load the cartridge [2] however, and hand-loading can be accomplished using the proper set of dies and using .25-06 Remington, .270 Winchester, or .30-06 Springfield brass and making the proper modifications to fit the 6.5-06 A-Square ...
.17 Ackley Bee.17 CCM.17 Hornet.17 Mach IV.17 Remington.17 Remington Fireball.19-223.19 Badger.19 Calhoon Hornet.20 BR.20 Tactical.20 VarTarg.204 Ruger.22 Accelerator.22 Hornet.22 CHeetah.218 Bee.219 Donaldson Wasp.219 Zipper.303/22.22 Savage Hi-Power.22 BR Remington.22 Eargesplitten Loudenboomer.22 PPC.22 Remington Jet.22 Spitfire.22 WCF
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A Republican senator has blocked the promotion of a general who oversaw the US withdrawal from Afghanistan, according to a source familiar with the matter, as President-elect Donald Trump has ...