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In one test, the 300 grain (19 g) jacketed flatpoint (JFP) gave a 25-yard group of 2.56 inches, and the 300-grain Jacketed hollow point (JHP) and 275-grain JHP gave a 25-yard group of 2.3 inches. [3] The penetration in gelatin (but not necessarily the kinetic energy) of the .50 GI is significantly different than the .45 ACP.
The 115 gr (7.5 g) 6.8-round has a higher muzzle energy of 1,694 ft⋅lb (2,297 J) due to its greater velocity, while the 125 gr (8.1 g) 300 BLK round has a muzzle energy of 1,360 ft⋅lb (1,840 J). Both rounds were made to be used in an easily converted AR-15 .
The .300 Whisper (7.82×34mm) is a CIP standard [1] cartridge in the Whisper family, a group of cartridges developed in the early 1990s by J.D. Jones of SSK Industries.It was developed as a multi-purpose cartridge, capable of utilizing relatively lightweight bullets at supersonic velocities as well as heavier bullets (200–250 grains) at subsonic velocities.
It can deliver a 250 grain (16 g) bullet with a muzzle velocity of over 1,900 feet per second (580 m/s), developing up to 2,000 ft-lb (2.7 kJ) of energy from a handgun. One Buffalo Bore loading drives a heavier, 300 grain, JFN bullet at 1,650 ft/s for 1,813 ft-lb of muzzle energy. [ 10 ]
However, the .500 Bushwhacker cartridge can generate 3,004.6 ft/s (916 m/s) with a 230-grain bullet from a 14-inch (356 mm) revolver. [ 6 ] The .460 cartridge achieves high velocities by combining light-for-caliber bullets, a large case capacity, and the high chamber pressures (65,000 psi maximum) typical of magnum rifle cartridges.
Kel Whelan, working with Brett Olin of CCI Ammunition came up with a round utilizing a unique 42 grain bullet and travelling at 1050 feet per second. [ 28 ] Two years later, the company began producing .300 Blackout ammunition in both supersonic and subsonic loads.
The .300 Norma Magnum, also known as .300 NM or 300 Norma, is a centerfire magnum rifle cartridge developed by Swedish ammunition manufacturer Norma Precision.The .300 Norma Magnum uses a .338 Norma Magnum parent case necked down to .30 caliber, [1] named to differentiate it from the older .308 Norma Magnum designed in 1960, and has begun to gain popularity among long-range shooters.
Black Talon is a brand of hollow-point pistol and rifle ammunition introduced in 1991 by Winchester, primarily intended for law enforcement and personal defense use.Black Talon rounds were known for the unique construction of the bullet and its sharp petal shape after expansion following impact with tissue or other wet media. [1]