Hsm Ammunition Hsm Ammo .338 Win Mag 250gr. Sbt Sierra Game King 20-pack. 338 Win Mag 250gr. Sbt Sierra Game King 20-pack online at OpticsPlanet. This HSM Ammunition Ammunition features Jacketed Soft Point (JSP) bullets that deliver strong stopping power perfect precision and predictability. With special offers on Ammunition and other high-quality rifle ammo from trusted brands like HSM Ammunition you re sure to find the ideal cartridge for your field or range use. Stock up today to save big on ammo and other top-tier tactical hunting and outdoor gear at OpticsPlanet. Specifications for Hsm Ammunition Hsm Ammo .338 Win Mag 250gr. Sbt Sierra Game King 20-pack: Manufacturer: HSM Ammunition Caliber: .338 Winchester Magnum Number of Rounds: 20 Bullet Type: Jacketed Soft Point (JSP) Bullet Weight: 250 grain Dimensions: 1.55 X 3.75 X 6.05 in Package Contents: Hsm Ammunition Hsm Ammo .338 Win Mag 250gr. Sbt Sierra Game King 20-pack