X-Treme Bullets 44 Magnum Caliber Pistol Bullets 200 Grain RNFP Heavy Plate 500 Bullets. 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 44 Magnum Caliber Pistol Bullets 200 Grain RNFP: Manufacturer: X-Treme Bullets Bullet Type: Round Nose Flat Point (RNFP) Caliber: .44 Magnum Cartridge Type: Brass Bullet Weight: 200 grain Projectile Caliber: .44 Caliber Diameter: 0.429 in Core Material: Lead Jacket Material: Copper Bullet Quantity: 500 Bullet Package Contents: X-Treme Bullets 44 Magnum Caliber Pistol Bullets 200 Grain RNFP X-Treme Bullets 44 Magnum Caliber Pistol Bullets 200 Grain RNFP Heavy Plate 500 Bullets