The Barnes VOR-TX 9mm ammo features new X-Bullet patented technology. The all-copper XPB bullets are designed for superior expansion and weight retention, which results in deeper penetration than ordinary non-lead 9mm Luger Ammunition. These accurate Barnes XPB 9mm rounds are ideal for self-defense but also the lead-free design makes them suitable for hunting or shooting in areas that prohibit the material. While Barnes XPB bullets have traditionally been aligned with large-caliber handgun hunting rounds, the 9mm is a new venture. And it makes sense.