Gamo .177 Caliber Whisper High Weight Quiet Pellets 150 Pack. Combining this pellet with your Gamo air rifle with Whisper Whisper Maxxim or Whisper Fusion Technology will make it even quieter. The Whisper pellet features a copper layer and long skirt increasing the weight flight stability and impact energy. Specifications for Gamo .177 Caliber Whisper High Weight Quiet Pellets - 150 Pack: Manufacturer: Gamo Finish: Black Nickel Fabric/Material: Lead Projectile Caliber: .177 Caliber Number of Rounds: 150 Bullet Type: Pellet / Air Gun Bullet Weight: 10.5 grain Lead Free: No Package Contents: Gamo .177 Caliber Whisper High Weight Quiet Pellets - 150 Pack Gamo 632272254: .177 Caliber Whisper High Weight Quiet Pellets 150 Pack