Barnes Bullets XPB 460 S&W .451 275 GR XPB 20 Box. These lead-free bullets provide superior expansion and weight retention. Energy transfer is unsurpassed making them ideal for hunting or self-defense. Barnes XPB bullets are exceptionally accurate and leave no residue to harm shooters in practice environments. Specifications for Barnes Bullets 30548 XPB 460 S&W .451 275 GR XPB 20 Box: Manufacturer: Barnes Bullet Type: Hollow Point (HP) Jacketed Hollow Point (JHP) Bullet Weight: 275 grain Sectional Density: 0.193 Projectile Caliber: .460 Caliber Bullet Quantity: 20 Bullet Country of Origin: USA Housing/Frame Material: Copper Fabric/Material: Copper Package Contents: Barnes Bullets 30548 XPB 460 S&W .451 275 GR XPB 20 Box Barnes Bullets 30548 XPB 460 S&W .451 275 GR XPB 20 Box