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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.
If barrel length and chamber pressure are equal, the .280 Ackley Improved is about 100 fps faster with all bullet weights than the standard .280 Remington. In 2007, ammunition manufacturer Nosler registered the .280 Ackley Improved with SAAMI and began providing factory loaded ammunition and rifles for it. Use of commercial ammunition needs to ...
.260 Remington.264 LBC-AR.264 Winchester Magnum.270 Weatherby Magnum.270 Winchester.270 Winchester Short Magnum.275 H&H Magnum.275 No 2 Magnum.275 Rigby.276 Enfield.276 Pedersen.277 FURY.277 Wolverine.28 Nosler.280 Ackley Improved.280 British.280 Flanged.280 Jeffery.280 Remington.280 Ross.284 Winchester
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.
Same cartridge as .244 Remington and interchangeable. Rifles marked .244 Remington may not stabilize heaviest 6mm Remington bullets. [3] 6mm BR Norma: 1996 [14] Sweden 3 [15] [16] R 6x39.6mm 2789 [15] 0.243 0.517 [15] 39.6mm Norma's redesigned of the Remington 6mm BR in order to utilize VLD bullets. 6mm XC: 2000 US 4 [17] [18] R 6×48mm 3018 ...
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6.8mm Remington SPC [5 ... .280 Ackley Improved [5 ... Voluntary Industry Performance Standards for Pressure and Velocity of Centerfire Rifle Ammunition for the ...
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