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The .450 Bushmaster is descended from the Thumper concept popularized by the gun writer Jeff Cooper.Cooper was dissatisfied with the small-diameter 5.56×45mm NATO (.223 Remington) of the AR-15, and envisioned a need for a large bore (.44 cal or greater) cartridge in a semi-automatic rifle to provide one-shot kills on big-game animals at 250 yards.
It is designed for deer hunting out to a maximum effective range of 300 yards (270 m). Overview ... .450 Bushmaster; List of AR platform cartridges; References
It is designed for deer hunting out to a maximum effective range of 250 yards (230 m). ... sensitivity precludes their use of cartridges such as .450 Bushmaster or 12 ...
.450 Bushmaster [6] Action: Short-stroke gas-operated piston, rotating bolt [5] Muzzle velocity: 3150 ft/s (960 m/s) (With 5.56x45mm NATO M855A1 ammunition) [7] Effective firing range: 900m [1] Feed system: 10, 20, & 30-round box magazine: Sights: Picatinny rail for mounting Picatinny mounted iron sights or various optical sights
Therefore, 500 m (550 yd) is considered the maximum effective range, even though the rifle is accurate at much greater ranges". ... .450 Bushmaster.45 Raptor.458 HAM ...
The .458 SOCOM (11.63×40mmRB) is a moderately large round designed to work in an AR-15 platform.This is achieved by installing a 458 bolt and barrel. The 300-grain (19 g) round offers a supersonic muzzle velocity of 1,900 ft/s (580 m/s) and 2,405 ft⋅lbf (3,261 J), [1] similar to a light .45-70 but with a much smaller case.
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.450 Marlin 7mm Remington Magnum 7mm Winchester Short Magnum 7mm-08 Remington United States: 1960s Brown Bess.69/17.5 mm United Kingdom: 1722 Brunswick rifle.654 in lead ball.704 in lead ball United Kingdom: 1836 BSA Autorifle: Birmingham Small Arms Company.303 British United Kingdom: 1924 Bushmaster M17S: Bushmaster Firearms International: 5. ...