X-Treme Bullets 9mm Luger 124 Grain Round Nose Pistol Ammo 500 Rounds. X-Treme Bullets process starts with a lead billet that is extruded into wire. The lead wire is then swaged into a core. The cores are copper plated then restruck once more. Though not common in the industry this restrike process produces a bullet that is more uniform with a more precise diameter and a smoother finish for a better shooting and better looking bullet. Specifications for X-Treme Bullets Pistol Bullets 9mm Luger 124 Grain Round Nose: Manufacturer: X-Treme Bullets Gun Type: Pistol Bullet Type: Round Nose (RN) Caliber: 9mm Luger Cartridge Type: Brass Bullet Weight: 124 grain Diameter: 0.355 in Core Material: Lead Jacket Material: Copper Projectile Caliber: .355 Caliber Bullet Quantity: 500 Bullet Package Contents: X-Treme Bullets Pistol Bullets 9mm Luger 124 Grain Round Nose X-Treme Bullets XB9R124B500: 9mm Luger 124 Grain Round Nose Pistol Ammo 500 Rounds