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The 7mm-08 with 139-140 grain loads does well against some 150-grain .308 Win. loads, providing good energy levels. One example is the Remington 7mm-08 140 PSP (1490 fpe at 300 yards) compared with the Remington 308 150 grain PSP (1344 fpe at 300 yards). [14] The 7mm-08 invites a ballistic comparison with the veteran, highly esteemed 7×57mm ...
7 mm Remington cartridges are all rifle cartridges with bullets of 7 millimetres (0.28 in) diameter developed and sold by Remington. These cartridges include: .280 Remington (7mm Express Remington) 7mm BR Remington (Bench Rest) 7mm Remington Magnum; 7mm Remington Ultra Magnum (RUM) 7mm Remington Short Action Ultra Magnum (SAUM) 7mm-08 Remington
The 7mm Backcountry is a modern rifle cartridge using cartridge cases of a proprietary steel alloy able to withstand higher pressures than traditional brass alloys. The objective is to obtain higher muzzle velocities from short-barreled rifles which are lighter and easier to carry than 20th-century rifles intended for long range shooting . [ 1 ]
The 7mm Shooting Times Westerner, sometimes referred to as the 7mm STW, began as a wildcat rifle cartridge developed by Layne Simpson, Field Editor of Shooting Times, in 1979. [3] It is an 8mm Remington Magnum case that has been "necked down" (narrowing the case opening) by 1 mm to accept 7 mm (.284 in) bullets.
[3]: 287–289 Nitrocellulose produces greater volumes of gas per volume of solid than black powder does, so nitrocellulose bulk powders were less dense than later smokeless powders. Nitrocellulose bulk powders designed for early straight-sided black powder rifle cartridges like the .32-40 and .38-55 were friable and easily crumbled.
Winchester claims a muzzle velocity (MV) of 3,225 ft/s with a 140 grain bullet for their 7mm WSM cartridge; the claimed muzzle energy (ME) is 3,233 ft. lbs. With a 160 grain bullet the Winchester figures are 2990 ft/s and 3176 ft. lbs. at the muzzle. The lighter, shorter 7mm bullets are preferred in these short case magnums. [2]
This is a list of firearm cartridges which have bullets in the 7.00 to 7.99 millimetres (0.2756 to 0.3146 in) caliber range. Length refers to the cartridge case length. OAL refers to the overall length of the cartridge.
Speer Bullets offers a 130 gr (8.42 gr), copper-jacketed soft-point flat-nosed bullet for use in lever-action rifles. It has a sectional density of 0.23 and a ballistic coefficient of 0.257 [ 7 ] Hornady Manufacturing Company now offers a 120 grain FTX bullet in 7mm/.284" caliber.