Federal Premium Varmint & Predator TNT .22 Winchester Magnum Rimfire 30 Grain Hollow Point Rimfire Ammo 50 Rounds. These rounds are ideal for use in small game hunts and on the varmint trail. They are very fast and provide terminal expansion upon impact. This ammo is available in a selection of calibers to ensure that you can find the right fit for your weapon of choice. The brand is a trusted among professional shooters and helped the U.S. team to bring back medals from the Olympic Games. Specifications for Federal Premium Varmint & Predator TNT .22 Winchester Magnum Rimfire 30 Grain Hollow Point Rimfire Ammunition: Manufacturer: Federal Caliber: .22 Winchester Magnum Rimfire Number of Rounds: 50 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 30 grain Cartridge Case Material: Brass Muzzle Velocity: 2200 ft/s Application: Varmint Package Type: Box Primer Style: Rimfire Muzzle Energy: 322 ft-lbs Features of Federal Premium Varmint & Predator Speer TNT .22 Winchester Magnum Rimfire 30 Grain Speer Hollow Point Rimfire Ammunition Extreme accuracy Explosive expansion on impact Speer TNT bullet design Reliable priming and propellant Package Contents: Federal Premium Varmint & Predator TNT .22 Winchester Magnum Rimfire 30 Grain Hollow Point Rimfire Ammunition What is Federal Premium Varmint & Predator TNT .22 Winchester Magnum Rimfire 30 Grain Hollow Point Rimfire Ammunition good for? The manufacturer thinks that it is suitable for varmint.Federal P765: Premium Varmint & Predator TNT .22 Winchester Magnum Rimfire 30 Grain Hollow Point Rimfire Ammo 50 Rounds