The 6.5mm Grendel (6.5×39mm) is an intermediate cartridge designed by Arne Brennan, Bill Alexander and Janne Pohjoispää as a low-recoil, high-accuracy cartridge specifically for the AR-15 platform at medium/long range (200–800 yard). The 6.5mm Grendel design goal was to create an effective 200–800 yard STANAG magazine-length cartridge for the AR-15 that surpassed the performance of the native 5.56mm NATO/.223 Remington cartridge. Constrained by the dimension of the magazines, the Grendel designers decided to use a shorter, larger diameter case for higher powder volume while allowing space for long, streamlined, high-ballistic coefficient (BC) bullets.
|Ammunition Type||Damage||Bullet Velocity (m/s)||Barrier Penetration||Armor Piercing|
|Lapua Hunter 265gr||17.41||680||5.3||10|
|Berger VLD 130gr||12.2||770||1.75||4|
|Wolf FMJ 100gr||12||850||1.9||5|
|Wolf FMJ 123gr||13.8||810||2.5||4|
Note: Barrier penetration represents the rounds ability to go through walls and barriers. Armor piercing represents the rounds ability to penetrate body armor plates.