HSM Subsonic 338ARC 300gr Hollow Point Boat Tail 20 Per Box/25 Case. This HSM Ammunition Ammunition features Jacketed Hollow Point (JHP) bullets that deliver strong stopping power superior accuracy and consistency. With amazing deals every day on Ammunition and other high-quality rifle ammo from trusted brands like HSM Ammunition you re sure to find the perfect firepower for your next hunting trip or range visit. Stock up today to save big on ammunition and other top-tier tactical hunting and outdoor gear at OpticsPlanet. Specifications for Hsm Ammunition Hsm 338 Arc 300gr Hpbt 20rd 25bx/cs: Manufacturer: HSM Ammunition Caliber: .338 ARC Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 300 grain Package Contents: Hsm Ammunition Hsm 338 Arc 300gr Hpbt 20rd 25bx/cs