Lawman Clean Fire Features Speer Lawman Clean-Fire ammunition gives shooters ideal indoor options. These offerings use the patented Clean-Fire primer which contains no lead barium or antimony. The TMJ bullet s lead core is completely encased so powder gases can t burn lead off the bullet base. Lawman Clean Fire Specifications Caliber: 40 S&W Model: Lawman Series: Clean Fire Bullet Weight: 180 gr Rounds Per Box: 50 Casing Material: Brass Application: Training Bullet Type: Total Metal Jacket (TMJ) Muzzle Energy: 400 ft lbs Muzzle Velocity: 1000 fps