BARNES 7MM

BARNES 7MM 08 REM 120 GR. TTSX-BT 20 RDS (21561) The 7mm Remington Magnum rifle cartridge was introduced as a commercially available round in 1962,^[2] along with the new Remington Model 700 bolt-action rifle. It is a member of the belted magnum family that is directly derived from the venerable. The original purpose of the belted magnum concept taken from the .300 H&H Magnum and .375 H&H Magnum, was to provide precise headspace control, since the sloping shoulders, while easing cartridge extraction, were unsuitable for this purpose. Improved cartridge extraction reliability is desirable while hunting dangerous game, in particular when a fast follow up shot is required. The 7mm Remington Magnum is based on the commercial .264 Winchester Magnum, .338 Winchester Magnum, and .458 Winchester Magnum, which were based on the same belted .30 H&H Magnum and .375 H&H Magnum cases, trimmed to nearly the same length as the .270 Weatherby Magnum.

On its introduction, the 7mm Remington Magnum substantially usurped the market share held by the Winchester Magnum, which went into sharp decline in popularity and sales after 1962.Re BARNES 7MM -08 REM 120 GR. TTSX-BT 20 RDS (21561) mington has offered Managed Recoil ammunition for achieving reduced recoil when shooting and for generating less meat damage when hunting smaller gam BARNES 7MM The 7mm Remington Magnum offers ballistics better than the .30-06 Springfield with all available bullet weights, one of the more popular loads being a 160 grain spitzer loaded to 3,000 ft/s (910 m/s). This is due both to the higher muzzle velocity of the magnum compared to the Springfield and that .284 diameter bullets tend to have better ballistic coefficients than .308 diameter bullets of comparable mass. Because of the smaller bullet diameter .284 diameter also have higher sectional density than .308 diameter bullets, and because of that better penetration in the target (it takes a 206 grain .308 diameter bullet to get the same sectional density as a 175 grain .284 bullet, an increased weight that requires 15-20% more muzzle energy to get the same muzzle velocity). The heaviest commercially loaded ammo available for the 7mm is 195 grains^{[citation needed]}, while the .30-06 Springfield can be loaded with bullets up to 220 grains, but for a .308 caliber to equal the flat trajectory and penetration of a .284 diameter 180 grain bullet with a muzzle velocity of 2,860 ft/sec (870 m/s), as offered for the 7mm Remington Magnum, requires muzzle energy close to what the .300 Winchester Magnum can offer, i.e. well beyond what the .30-06 can deliver.

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