Sierra Bullets MatchKing Rifle Bullets .375 Caliber Hollow Point Boat Tail/HPBT 350 grain 50 Bullets/Box. 375 caliber Hollow Point Boat Tail (HPBT) Bullets are designed and manufactured to the highest quality standards. Tests demonstrate that Sierra MatchKing & Sierra Tipped MatchKing bullets are suitable for any .375 caliber rifle even .375 magnum. These .375 cal bullets boasts incredibly dense materials and the thin jackets reduce overall drag. This results in higher velocities and down range hits on targets. These .375 cal bullets are recognized around the world for record-setting accuracy. Additionally they meet specific performance requirements outlined by the National Match Companion Program. Whether you're practicing target shooting or heading to a shooting range these are the bullets you can count on. Specifications for Sierra Bullets MatchKing 350 gr. .375 Cal HPBT Rifle Bullets: Manufacturer: Sierra Bullets Gun Type: Rifle Bullet Type: Boat Tail Hollow Point (BTHP) Hollow Point (HP) Bullet Weight: 350 grain Projectile Caliber: .375 Caliber Diameter: 0.375 in Sectional Density: 0.355 Country of Origin: USA Package Contents: Sierra Bullets MatchKing 350 gr. .375 Cal HPBT Rifle Bullets Sierra Bullets 9350T: MatchKing Rifle Bullets .375 Caliber Hollow Point Boat Tail/HPBT 350 grain 50 Bullets/Box