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The twist rate for the 7x64 is 1 in 8.66 inch against 1 in 10 inch for the 280 Remington. Nearly every European rifle producer offers the 7x64 as a standard caliber. The .280 Remington does, however, have a larger than expected number of European users in imported self-loading rifles such as those by Remington.
The American .280 Remington cartridge is probably the closest ballistic twin of the 7×64mm. When compared to the 7×64mm, the .280 Remington has a slightly lower maximum allowed chamber pressure and as an American 7 mm cartridge has a slightly smaller groove diameter. European 7 mm cartridges all have 7.24 mm (0.285 in) grooves Ø diameter. [6]
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.
The .284 Winchester was designed to achieve .270 Winchester and .280 Remington performance from the new Winchester Model 100 autoloader and Winchester Model 88 lever-action rifles. The result was a 7 mm cartridge with about the same overall length as the .308 Winchester but with a wider body, that yields a powder capacity about the same as that ...
280 Rem 30-06 .375 H&H .458 Win Mag Legacy. Originally offered at less than 90 USD (about 1141 USD today), the rifles were affordable and well received by the public ...
Remington–Keene rifle: Remington Arms.45-70 United States: 1878 Remington M1867: Remington Arms: 12.17×42mm RF 12.17×42mm RF 12.17×44mmR centerfire 10.15×61mmR 8×58mmR Danish Krag United States: 1867 Remington 1903/A3 Remington Arms.30-06 Springfield United States: 1941-45 Remington Model 5: Remington Arms.17 HMR.22 Long Rifle.22 ...
Rifling twist: 1:8.66 in (220 mm) ... The .280 British was an experimental rimless ... 7mm BR Remington, a wildcat cartridge, at one time produced by Remington ...
The common rifling twist rate for this cartridge is 280 ... The 7.62×45mm cartridge is approximately of the same overall length as the 5.56 NATO and .223 Remington ...