Hsm Ammunition Hsm 22 Arc 75gr Bthp 20rd 25bx/cs. This HSM Ammunition Ammunition features Jacketed Hollow Point (JHP) bullets that deliver powerful stopping power pinpoint accuracy and reliability. With special offers on Ammunition and other top-tier rifle ammo from trusted brands like HSM Ammunition you re sure to find the ideal cartridge for your next outdoor adventure or training session. Stock up today to save big on ammo and other top-tier tactical hunting and outdoor gear at OpticsPlanet. Specifications for Hsm Ammunition Hsm 22 Arc 75gr Bthp 20rd 25bx/cs: Manufacturer: HSM Ammunition Caliber: .22 ARC (Advanced Rifle Cartridge) Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 75 grain Package Contents: Hsm Ammunition Hsm 22 Arc 75gr Bthp 20rd 25bx/cs