![]() Performance C-Products 26-round Grendel Magazine A 6.5mm Grendel magazine with the same dimensions as a 30-round STANAG magazine will hold 26 rounds of Grendel ammunition. The increased case diameter results in a small reduction in the magazine ammo capacities. This diameter is larger than the 5.56×45mm NATO, thereby necessitating the use of a non-standard AR-15 bolt. The case head diameter of the Grendel is the same as that of the 5.6×39mm (.220 Russian), 7.62×39mm and 6.5mm PPC cases. Depending on their case material and bullet weight, 6.5mm Grendel cartridges weigh 14.7 to 17.8 grams (227 to 275 gr). Firing factory-loaded ammunition with bullets ranging from 90 to 129 grains (5.8 to 8.4 g), its muzzle velocity varies from 2,500 ft/s (760 m/s) with 129- and 130-grain (8.4 g) bullets to 2,900 ft/s (880 m/s) with 90 gr (5.8 g) bullets (similar in velocity to a 77-grain (5.0 g) 5.56 mm round). Constrained by the dimension of the STANAG magazines, the Grendel's designers decided to use a shorter, larger-diameter case for higher powder volume while allowing space for the long, streamlined, high ballistic coefficient 6.5mm (.264 cal.) bullets. The goal of the 6.5mm Grendel design was to create an effective STANAG magazine-length cartridge for the AR-15 platform that could reach 200–800 yd (180–730 m) and surpass the performance of the native 5.56mm NATO/. It was a trademark owned by Alexander Arms (Bill Alexander's company in Radford, Virginia) and manufactured at Radford Arsenal, until legally released in 2010 for SAAMI standardization with collaboration from Hornady. The name "Grendel" is inspired by the mythical monster antagonist from the Old English epic poem Beowulf. Since its introduction, it has proven to be a versatile cartridge and is now expanding into other firearm design platforms including bolt-action rifles and the Kalashnikov system. The 6.5mm Grendel cartridge was first unveiled in May 2003 at the Blackwater Training Facility in North Carolina, where it remained supersonic at 1,200 yd (1,100 m) range and out-shot the 7.62mm NATO with only half the recoil. It is an improved variation of the 6.5mm PPC. The 6.5mm Grendel is an intermediate cartridge jointly designed by British-American armorer Bill Alexander, competitive shooter Arne Brennan (of Houston, Texas) and Lapua ballistician Janne Pohjoispää, as a low- recoil, high- precision rifle cartridge specifically for the AR-15 platform at medium/long range (200–800 yard). Source(s): Alexander Arms Pressure-safe Load Data 350 LegendĬalibers with a bullet diameter of 0.458" or less. This includes, but is not limited to: 9mm Luger. 338 XTĬalibers with a bullet diameter of 0.358" or less. 270 WSM 27 Nosler 6.8 SPC 6.8 WesternĬalibers with a bullet diameter of 0.338" or less. ![]() ![]() 300 Whisper 7mm RUM 7mm Magnum 28 Nosler 7mm-08 Winchester 284 Win 7mm STW. 243 Winchester 6.5 PRC 26 NoslerĬalibers with a bullet diameter of 0.308" or less. This includes, but is not limited to: 6.5 Grendel 6.5-284 Norma 6.5 Creedmoor 6mm Creedmoor 6mm BR 6mm XC 6mm Dasher. This includes, but is not limited to: 6mm Creedmoor 6mm Dasher 6mm Benchrest 6mm ARCĬalibers with a bullet diameter of 0.264" or less. 223 RemingtonĬalibers with a bullet diameter of 0.243" or less. 450 Hypertap would sufficiently handle that cartridge (.450" + 0.060" clearance = 0.510" total bore diameter).Ĭalibers with a bullet diameter of 0.224" or less. Our angled-baffle brakes, for example, have a clearance of 0.060". It's also worth noting that muzzle devices have a clearance that needs to be considered. This is because the bullet for that cartridge has a. ![]() 300 Win Mag, you would select a 7.62/.308 muzzle device. When selecting a caliber for one of our muzzle devices, the correct choice is based on your cartridge's actual bullet diameter.
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