Sierra Bullets MatchKing Rifle Bullets .22 Caliber Hollow Point Boat Tail/HPBT 77 grain 500 Bullets/Box. The 77 grain #9377 MatchKing allows seating to an OAL that permits cartridges to be loaded into M16/AR15 magazines. 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 18in or faster. Specifications for Sierra Bullets MatchKing 77 gr. .22 Cal HPBT Rifle Bullets 500 Count: Manufacturer: Sierra Bullets Gun Type: Rifle Bullet Type: Boat Tail Hollow Point (BTHP) Hollow Point (HP) Bullet Weight: 77 grain Projectile Caliber: .22 Caliber Diameter: 0.224 in Sectional Density: 0.219 Bullet Quantity: 500 Bullet Country of Origin: USA Package Contents: Sierra Bullets MatchKing 77 gr. .22 Cal HPBT Rifle Bullets 500 Count Sierra Bullets 9377: MatchKing Rifle Bullets .22 Caliber Hollow Point Boat Tail/HPBT 77 grain 500 Bullets/Box