The Gamo Whisper Pellet High Weight Quiet Pellet .177 Cal comes in tin of 150 and are made of lead. Use the heavy weight hunting pellet for maximum energy and quietness. Combine with Gamo air rifle Whisper technology. They also feature a round nose. The Whisper pellet features a copper layer and a long skirt, increasing the weight, the flight stability, and the impact energy ideal for hunting.