Aguila Ammunition .17 Hornady Magnum Rimfire 20grain Jacketed Hollow Point Brass Cased Pistol Ammo 50 Rounds. Its unique design allows for the bullet to expand like a big game bullet providing heavy knockdown power on impact. Specifications for Aguila Ammunition .17 Hornady Magnum Rimfire 20grain Jacketed Hollow Point (JHP) Brass Cased Pistol Ammunition: Manufacturer: Aguila Ammunition Caliber: .17 Hornady Magnum Rimfire Number of Rounds: 50 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 20 grain Cartridge Case Material: Brass Muzzle Velocity: 1785 ft/s Package Type: Box Primer Style: Rimfire Package Contents: Aguila Ammunition .17 Caliber 20 Grain Jacketed Hollow Point Pistol Ammunition Aguila Ammunition 1B222347: .17 Caliber 20 Grain Jacketed Hollow Point Brass Cased Pistol Ammo 50 Rounds