HSM Ammunition Classic .500 S&W Magnum 350 Grain Jacketed Hollow Point Brass Cased Pistol Ammo 20 Rounds. Available in a wide variety of calibers (rifle and handgun) loads and bullet types/weights. These classic offerings are for the guns you use on a regular basis for a wide variety shooting activities. All day every day you can depend on HSM Classics to give you solid predictable HSM performance. The XTP Mag is Extreme Terminal Performance/Mag. Specifications for HSM Ammunition Classic .500 S&W Magnum 350 Grain Jacketed Hollow Point Brass Cased Pistol Ammunition: Manufacturer: HSM Ammunition Caliber: .500 S&W Magnum Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 350 grain Cartridge Case Material: Brass Muzzle Velocity: 1725 ft/s Application: Hunting Primer Style: Centerfire HSM Ammunition 500SW1N: Classic .500 S&W Magnum 350 grain Jacketed Hollow Point Brass Cased Pistol Ammo