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The 6.5-284 has been used extensively in benchrest competitions and is known as an extremely accurate long range round. Using an improved version of the 6.5-284, Rich DeSimone set a 1,000-yard (914.4 m) world record with a 1.564-inch (39.73 mm) group. [ 4 ]
The U.S. based Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) has listed a number of known unsafe firearm chamber and cartridge combinations which can happen due to mixing of different common cartridges. [1] Examples include: Firing a .22 Long Rifle round in a .17 HMR rifle
The .284 Winchester has 4.29 ml (66 grains H 2 O) of cartridge case capacity. The case has a rebated rim and a body almost as large in diameter as that of typical belted magnum cases. .284 Winchester maximum C.I.P. cartridge dimensions All sizes in millimeters (mm). [3] Americans would define the shoulder angle at alpha/2 = 35 degrees.
Walter D.M. Bell, who was known to have shot over a thousand elephants in his lifetime, used, among others, .264 caliber and .284 caliber rifles to do so. [ 8 ] [ 9 ] The .260 Remington, while having a slightly lesser case capacity than the 6.5×55mm, is loaded to higher pressure levels.
It has a slightly smaller bullet diameter of .279 in (7.1 mm) (versus .284 in or 7.2 mm for the .280) but a lighter bullet (93 to 100 gr or 6.0 to 6.5 g) with a greater muzzle velocity (2,750–2,800 ft/s or 840–850 m/s), longer case (1.8 in or 46 mm) and shorter overall length (2.45 in or 62 mm).
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The 6.5mm Creedmoor designated as 6.5 Creedmoor by SAAMI, and as 6,5 Creedmoor by the C.I.P. [ 4 ] is a centerfire rifle cartridge introduced by Hornady in 2007. [ 6 ] It was developed by Hornady senior ballistics scientist Dave Emary in partnership with Dennis DeMille, the vice-president of product development at Creedmoor Sports, hence the name.
The 6.5×47mm Lapua (designated as the 6,5 × 47 Lapua by the C.I.P.) [1] is a smokeless powder rimless bottlenecked rifle cartridge that was developed specifically for 300–1,000 m (328–1,094 yd) competition shooting by ammunition maker Nammo Lapua and the Swiss rifle manufacturer Grünig & Elmiger AG in 2005. [2]