Sierra Bullets 6.5mm Caliber 142 Grain HPBT MatchKing Rifle Bullets. 5mm/.264 inch bore has recently enjoyed a resurgence of interest. Several rifle manufacturers currently produce 6.5x55mm sporters exposing a new generation of shooters to this famous old Scandinavian service and hunting cartridge. Competitive HighPower and Silhouette shooters have also shown great interest in the 6.5mm bore size. The 142 grain #1742 bullet has a longer ogive radius than the 140 grain #1740 bullet and thus a higher ballistic coefficient with less sensitivity to crosswinds. While they are recognized around the world for record-setting accuracy MatchKing and Tipped MatchKing bullets are not recommended for most hunting applications. Although MatchKing and Tipped MatchKing bullets are commonly used for varmint hunting their design will not provide the same reliable explosive expansion at equivalent velocities in varmints compared to their lightly jacketed Hornet Blitz or Varminter counterparts. This bullet requires a barrel twist rate of 1 8" or faster. Specifications for Sierra Bullets 6.5mm Caliber 142 Grain HPBT MatchKing Rifle Bullets: Manufacturer: Sierra Bullets Bullet Type: Boat Tail Hollow Point (BTHP) Hollow Point (HP) Bullet Weight: 142 grain Projectile Caliber: .264 Caliber Sectional Density: 0.291 Bullet Quantity: 100 Bullet Barrel Twist Rate: 1-8 Country of Origin: USA Fabric/Material: Copper Package Contents: Sierra Bullets 1742 MatchKing 6.5mm .264 142 GR Hollow Point Boat Tail (HPBT) 100 Box Sierra Bullets 1742 MatchKing 6.5mm .264 142 GR Hollow Point Boat Tail HPBT 100 Box