Sierra .41 Caliber (.410) bullets weigh 170 grains and feature a jacketed hollow cavity (JHC) design. This box contains 100 rounds, making it suitable for various reloading applications.Key FeaturesBullet Type: Jacketed Hollow Cavity (JHC) design promotes effective expansion.Bullets per Box: Each box includes 100 rounds.Sectional Density: .144, supporting stable performance.Ballistic Coefficients: .123 at 1300 fps and below, .122 between 1300 and 900 fps, and .120 at 900 fps and below.