Caliber: .223 RemBullet: Copper Monolithic Deep-Cavity FragmentingWeight: 55 grVelocity: >3000 FPSRounds Per Box: 20Liberty Ammunition's Silverado .223 Rem. Lead-Free Monolithic Deep-Cavity Fragmenting Rifle Rounds are the world's first high-performance .223 Rem rounds that deliver superior lethality. The rounds leverage Liberty's proven and patented technologies to deliver superior range accuracy and terminal effect.The result - stopping power of over 1100 ft. lbs and fragmentation of up to 9 pieces while achieving maximum effectiveness.