Sierra Bullets Sports Master Pistol Bullets .50 Caliber Jacketed Hollow Point/JHP 350 grain 50 Bullets/Box. 300 AAC Blackout cartridge designed for the AR platform. This bullet has also proven to be exceptionally accurate in bolt action rifles and other .30 caliber AR chamberings. The jacket was specifically designed to handle velocities ranging up through common .30 caliber midlevel cartridges. 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. View Sierra Bullet's 300 AAC Blackout Load Data. The #2121 became available for sale in January 2012. Specifications for Sierra Bullets Sports Master 350 gr. .50 Cal JHP Pistol Bullets 50 Count: Manufacturer: Sierra Bullets Gun Type: Handgun Bullet Type: Jacketed Hollow Point (JHP) Hollow Point (HP) Bullet Weight: 350 grain Diameter: 0.5 in Sectional Density: 0.2 Projectile Caliber: .50 Caliber Bullet Quantity: 50 Bullet Country of Origin: USA Package Contents: Sierra Bullets Sports Master 350 gr. .50 Cal JHP Pistol Bullets 50 Count Sierra Bullets 5350: Sports Master Pistol Bullets .50 Caliber Jacketed Hollow Point/JHP 350 grain 50 Bullets/Box