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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 ]
As noted above, the Grendel case is very closely related to the .220 Russian case. In general, each additional grain of bullet weight will reduce muzzle velocity by 10.8 ft/s (50.8 m/s for each gram) and each additional inch of barrel length will increase muzzle velocity by 20 ft/s (2.4 m/s for each centimeter).
Name Bullet Case type Case length Rim Base Shoulder Neck OAL .25 ACP (.25 Auto): 6.375 (.251) 15.62 (.615) 7.67 (.302) 7.06 (.278)-7.06 (.278) 23.11 (.910) .25 NAA: 6 ...
From left to right: 1.17 Hornady Mach 2, 2.17 Hornady Magnum Rimfire, 3.22 Long Rifle, 4.22 Winchester Magnum Rimfire, 5.17/23 SMc, 6 5mm/35 SMc, 7.22 Hornet, 8.223 Remington, 9.223 WSSM, 10.243 Winchester, 11.243 Winchester Improved (Ackley), 12.25-06 Remington, 13.270 Winchester, 14.308 Winchester, 15.30-06 Springfield, 16.45-70 Government ...
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 RPR was originally announced in the following calibers and configurations: .308 Win. with 1:10 twist, 20 in (51 cm) barrel, weighing 9.7 lb (4.4 kg) 6.5 Creedmoor with a 1:8 twist, 24 in (61 cm) barrel, weighing 10.6 lb (4.8 kg)
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]
The cartridge is a necked-up version of the .22 PPC which is in turn based on a .220 Russian (5.6×39mm). [5] The standard bullet diameter for 6 mm caliber cartridges is .243 inches (6.2 mm), the same diameter used in the .243 Winchester and 6mm Remington cartridges.