Varmint hunting places extreme demands on bullet performance. Such bullets must be exceptionally accurate to hit small targets, lightly constructed to provide explosive expansion while minimizing ricochets, and lightweight to obtain high velocities with flat trajectories.Sierra BlitzKing bullets are the standard against which other brands are measured..22 Caliber BlitzKing55 GrainDiameter: .224/5.69mmSectional Density: .157Ballistic Coefficients: .271 3100 fps and above .264 between 3100 and 2550 fps .250 2550 and 2050 fps .236 between 2050 and 1800fps .224 1800 fps and belowNote: These are component bullets, not loaded ammunition.