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The .28 Nosler is based on the .26 Nosler which was released in 2014. The .28 Nosler shares the same overall cartridge length of 84.8 mm (3.340 in) as the .26 Nosler which allows it to be chambered in standard-length action. [14] This feature helps weight-conscious sportsmen to lighten their load before venturing into the backcountry.
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.
Miller twist rule is a mathematical formula derived by American physical chemist and historian of science Donald G. Miller (1927-2012) to determine the rate of twist to apply to a given bullet to provide optimum stability using a rifled barrel. [1]
22 Nosler : Proprietary, uses the head and rim dimensions of the 5.56x45, and a case-body that is similar to the 6.8 SPC case. To increase powder capacity, the shoulder is located higher than the 6.8, and the case is longer.
Rifling twist: 1 in 16.5 in (420 mm) ... high-velocity cartridges based on the .404 Jeffery design are the .26 Nosler, .28 ... introduced by Nosler between 2013 ...
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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.
Bullets weighing 2.6 g (40 grains) or less are recommended for optimal use in 5.7×28mm applications, [47] but the 228.6 mm (1:9 in) rifling twist rate (distance the bullet must travel to complete one full revolution) used in the firearms' barrels will stabilize bullets weighing up to 4.5 g (70 grains).