Barnes Bullets Varmint Grenade 22 Caliber FBHP 36gr Reloading Bullets - 250 Count - Featuring a frangible copper-tin powdered metal core surrounded by a gilding metal jacket for instant fragmentation, these bullets expend energy quickly, seldom exit large predators, and leave valuable pelts virtually undamaged. Sectional Density: .102 Twist Rate: 1: 14in or Faster Length: .697