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Nosler will be offering their complete line of M48 rifles in the .27 Nosler chambering. Initial factory loads will include the 9.7 g (150 gr) AccuBond and the 10.7 g (165 gr) AccuBond Long Range (ABLR) bullets. For handloaders, Nosler will also offer fully prepared Nosler brass, bullets and reloading data for the .27 Nosler.
The resulting COAL of 2.300" is only 1.02 mm longer than the maximum COAL for chambering a cartridge in the smaller AR-15; however, the 45 Raptor chamber pressure is allowed to be as high as 62,000 PSI. This means that the stronger AR-10 receiver and bolt carrier group is needed for shooting this cartridge.
The 6.8mm Remington Special Purpose Cartridge (6.8 SPC, 6.8 SPC II or 6.8×43mm) is a rimless bottlenecked intermediate rifle cartridge that was developed by Remington Arms in collaboration with members of the U.S. Army Marksmanship Unit and United States Special Operations Command [6] to possibly replace the 5.56 NATO cartridge in short barreled rifles (SBR) and carbines.
These Nosler Partition bullets used a specially designed jacket enclosing two separate lead alloy cores. [1] The front core was open on the nose to expand easily, but expansion would stop at the partition (which was a solid layer of copper extending right across the bullet, not just the thin shell of copper which composed the jacket).
The .257 Weatherby Magnum is capable of firing a 115 gr (7.5 g) Nosler Ballistic Tip bullet at 3,400 ft/s (1,036 m/s) generating 2,952 ft⋅lbf (4,002 J) of energy [3] which is comparable to factory loadings of the .30-06 Springfield and the .35 Whelen in terms of energy.
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 .378 Weatherby Magnum was designed by Roy Weatherby in 1953. [3] [4] Although inspired by the .416 Rigby, it is an original belted magnum design with no parent case. [5]The cartridge features a high powder capacity relative to its bore size, and can hold upwards of 7.13 g (120 gr) of powder.
While it is true that a .280 Remington case can be formed from a .30-06 Springfield case, the case length of a .30-06 is 63.3 millimetres (2.494 in) while the case length of a .280 is 64.5 millimetres (2.540 in), the same as a .30-03 Springfield. However, resized cases often stretch making up the difference in length and "The slight difference ...