Federal's Tactical Bonded ammunition built for law enforcement use is designed to deliver deep penetration with strong expansion! The bullets loaded into this line of ammunition bond the lead core to the copper jacket. The bonding process is designed to ensure that regardless of the barrier that this bullet penetrates, the lead core and copper jacket will not separate from each other. During impact, when a lead core separates from its jacket, the result is that there is no longer enough mass to achieve sufficient penetration to reach vitals. This Tactical Bonded line of ammunition is a great fit for law enforcement with its deep penetration.