Celebrating its 75 th Anniversary, Barnes Bullets ® is introducing the Varmint Grenade™, an all-new .224 36 grain lead-free varmint bullet that delivers explosive results. The new flat-base, hollow-cavity bullet remains intact at ultra-high velocities, yet fragments explosively on impact. Virtually vaporizes rabbits and feral cats, even at extended range. The bullet blows up completely at high speed, creating little or no exit wound on larger animals. Leaves fox pelts virtually undamaged.