Speer TMJ Handgun Bullet .357 125 Grain Total Metal Jacket Pistol Bullet 600. It's cleaner more accurate and more consistent than any FMJ. Specifications for Speer TMJ Handgun Bullet .357 125 Grain Total Metal Jacket Pistol Bullet: Manufacturer: Speer Bullet Type: Full Metal Jacket (FMJ) Caliber: .357 SIG Bullet Weight: 125 grain Sectional Density: 0.014 Projectile Caliber: .357 Caliber Weight: 125 g Fabric/Material: Copper Features of Speer TMJ Handgun Bullet .357 125 Grain Total Metal Jacket Pistol Bullet Uni-Cor technology completely encases the lead core in a seamless jacket Design eliminates the accuracy-robbing features of conventional full metal jacket bullets Reduces fouling and airborne lead Consistent bullet diameters and a uniform heel Package Contents: Speer TMJ Handgun Bullet .357 125 Grain Total Metal Jacket Pistol Bullet Speer 4731: TMJ Handgun Bullet .357 125 Grain Total Metal Jacket Pistol Bullet 600