HSM Ammunition Varmint .204 Ruger 39 Grain Sierra Blitzking Brass Cased Centerfire Rifle Ammo 20 Rounds. These highly-accurate rounds come in a variety of calibers for all various types of varmints. This ammunition is non-corrosive reloadable brass cased and boxer primed. Specifications for HSM Ammunition Varmint .204 Ruger 39 Grain Sierra Blitzking Brass Cased Centerfire Rifle Ammunition: Manufacturer: HSM Ammunition Caliber: .204 Ruger Number of Rounds: 20 Bullet Type: Polymer Tipped Boat Tail (PTBT) Bullet Weight: 39 grain Cartridge Case Material: Brass Application: Hunting Package Type: Box Included Accessories: None Primer Style: Centerfire Features of HSM Ammunition Varmint .204 Ruger 39 Grain Sierra Blitzking Brass Cased Centerfire Rifle Ammunition: BlitzKing bullet Muzzle Velocity: 3857 fps Muzzle Energy: 1289 ft. lbs. Designed for varmint hunting Package Contents: HSM Ammunition Varmint .204 Ruger 39 Grain Sierra Blitzking Brass Cased Centerfire Rifle Ammunition What is HSM Ammunition Varmint .204 Ruger 39 Grain Sierra Blitzking Brass Cased Centerfire Rifle Ammunition good for? The manufacturer says that it is best for hunting.HSM Ammunition HSM-204R-4-N: Varmint .204 Ruger 39 Grain Sierra Blitzking Brass Cased Centerfire Rifle Ammo 50 Rounds