The six.5mm Grendel is really an intermediate cartridge jointly intended by British-American armorer Invoice Alexander, competitive shooter Arne Brennan (of Houston, Texas) and Lapua ballistician Janne Pohjoispää, to be a lower-recoil, large-precision rifle cartridge especially for the AR-15 System at medium/prolonged variety (two hundred–800 garden). It is an enhanced variation from the six.5mm PPC. The 6.5mm Grendel cartridge was 1st unveiled in Might 2003 within the Blackwater Education Facility in North Carolina, where it remained supersonic at 1,two hundred yd (1,one hundred m) range and out-shot the 7.62mm NATO with only 50 % the recoil. Considering that its introduction, it has established to become a flexible cartridge and is now increasing into other firearm structure platforms which includes bolt-motion rifles and also the Kalashnikov process.
The identify "Grendel" is impressed because of the mythical monster antagonist from your Outdated English epic poem Beowulf. It absolutely was a trademark owned by Alexander Arms (Bill Alexander's firm in Radford, Virginia) and created at Radford Arsenal, till legally unveiled in 2010 for SAAMI standardization with collaboration from Hornady. get more info The goal in the 6.5mm Grendel style and design was to create a highly effective STANAG journal-duration cartridge with the AR-15 platform that may get to two hundred–800 yd (a hundred and eighty–730 m) and surpass the performance from the native 5.56mm NATO/.223 Remington cartridge. Constrained with the dimension with the STANAG Journals, the Grendel's designers made a decision to utilize a shorter, larger-diameter case for greater powder volume although making it possible for Place for that extensive, streamlined, superior ballistic coefficient six.5mm (.264 cal.) bullets. Firing manufacturing unit-loaded ammunition with bullets starting from ninety to 129 grains (five.8 to 8.4 g), its muzzle velocity varies from two,five hundred ft/s (760 m/s) with 129- and a hundred thirty-grain (eight.4 g) bullets to 2,900 ft/s (880 m/s) with 90 gr (5.8 g) bullets (identical in velocity to the 77-grain (5.0 g) five.56 mm spherical). Determined by their circumstance product and bullet body weight, 6.5mm Grendel cartridges weigh fourteen.7 to 17.8 grams (227 to 275 gr).
The situation head diameter with the Grendel is the same as that on the 5.6×39mm (.220 Russian), seven.sixty two×39mm and 6.5mm PPC instances. This diameter is bigger compared to 5.fifty six×45mm NATO, therefore necessitating the use of a non-standard AR-fifteen bolt. The enhanced situation diameter results in a little reduction from the magazine ammo capacities. A six.5mm Grendel journal With all the exact same Proportions being a 30-spherical STANAG magazine will hold 26 rounds of Grendel ammunition.
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