Caliber: 17 Hornady Mach 2 (HM2) - Rounds Per Box: 50 Rounds Per Box - Bullet Type: V-Max - Bullet Weight: 17 GR - Muzzle Energy: 166 ft lbs - Muzzle Velocity: 2100 fps - Hornadys V-MAX bullets consistently achieve rapid fragmentation at all practical varmint shooting velocities. Every Varmint Express cartridge is hand inspected before leaving our factory ensuring there are no cosmetic flaws and imperfections.