The Pro Magnum pellet has an extraordinary performance based on penetration and expansion...Thanks to its clean design based on a big head and smooth lines, the Pro Magnum has an extraordinary expansion as well as a surprising grouping. Better distribution of weight makes these pellets extremely accurate at any distance. Bigger mass of the pellet head provides more knocking impact at long distances. Higher composition of antimonium makes it harder and provides more penetration.Specifications* Model # 15062* Caliber: .177 (4.5mm)* Weight: 7.41 grains (0.48 grams)* Approx 500 pellets a tin.