6.5mm Grendel kits and parts
The 6.5 Grendel is a proprietary intermediate cartridge developed in 2002 by Bill Alexander of Alexander Arms and Arne Brennan (Founder of Competition Shooting Sports, Inc). This cartridge is an improved version of the PPC cartridge family designed by Dr. Lou Palmisano and Ferris Pindell in 1974.[1] The first 6.5mm member of the PPC cartridge family was created in 1984 by Dr. Louis Palmisano and William Davis, Ph.D, for competition bolt action rifles and applied to the AR-15/M-16 platform in 1998 by Arne Brennan.[2] The cartridge was designed as a low recoil, high accuracy, long-range cartridge for the AR-15 platform.
The name "6.5 Grendel" is a trademark owned by Alexander Arms; Les Baer Custom has released a new cartridge known as the .264 LBC-AR which uses the same cartridge case, but has different chamber dimensions from those using the "6.5 Grendel" brand.
SpecificationsParent case .220 Russian
Case type Rimless, bottleneck
Bullet diameter 6.71 mm (0.264 in) Neck diameter 7.44 mm (0.293 in)
Shoulder diameter 10.87 mm (0.428 in) Base diameter 11.15 mm (0.439 in)
Rim diameter 11.2 mm (0.44 in) Rim thickness 1.5 mm (0.059 in)
Case length 38.7 mm (1.52 in) Overall length 57.5 mm (2.26 in)
Rifling twist 1 in 8" or 1 in 9"
Ballistic performance
Bullet weight/type Velocity Energy
90 gr (5.8 g) Speer TNT 2,880 ft/s (880 m/s) 1,658 ft·lbf (2,248 J)
120 gr (7.8 g) Norma FMJBT 2,700 ft/s (820 m/s) 1,942 ft·lbf (2,633 J)
123 gr (8.0 g) Sierra Matchking 2,650 ft/s (810 m/s) 1,917 ft·lbf (2,599 J)
130 gr (8.4 g) Norma 2,510 ft/s (770 m/s) 1,818 ft·lbf (2,465 J)
108 gr (7.0 g) Scenar (moly) 2,790 ft/s (850 m/s) 1,866 ft·lbf (2,530 J)
Test barrel length: 24 inches
