HSM Match 223 Rem 77 Gr Sierra MatchKing Boat-Tail Hollow Point BTHP. The best components time-honored crafting make the difference. Specifications for HSM 22311N Match 223 Rem 77 Gr Sierra MatchKing Boat-Tail Hollow Point (BTHP) 5: Manufacturer: HSM Ammunition Caliber: .223 Remington Number of Rounds: 50 Bullet Type: Boat Tail Hollow Point (BTHP) Bullet Weight: 77 grain Cartridge Case Material: Brass Muzzle Velocity: 2680 ft/s Application: Target Primer Style: Centerfire What is HSM 22311N Match 223 Rem 77 Gr Sierra MatchKing Boat-Tail Hollow Point (BTHP) 5 good for? The manufacturer says that it is suitable for target.