Description
The name “6.5mm Grendel” was developed by Alexander Arms until it was legally released to allow the cartridge to become standardized. The Grendel designers decided to use a shorter, larger diameter case for higher powder volume while allowing space for long, streamlined bullets. The case head size of the Grendel is the same as that of the7.62×39 case. This diameter is larger than the 5.56×45mm NATO. The increased case diameter results in a small reduction in the capacity of standard size AR-15 magazines. A Grendel magazine with the same dimensions as a 30-round magazine and will hold 26 rounds of 6.5mm Grendel ammunition.
