Barnes Bullets 21551: TAC-XPD is the optimized solution for personal and home defense. Loaded with Barnes TAC-XP bullets, TAC-XPD ammunition is engineered and designed to deliver top performance when it is most critical: in life-threatening situations. The TAC-XP\'s all-copper construction and very large, deep hollow-point cavity expand, penetrate and perform more consistently than any personal defense product on the market.