Product Description Speer TMJ (Total Metal Jacket) handgun bullets are built for clean, consistent range performance. Unlike conventional full metal jacket (FMJ) bullets that can leave lead exposed at the base, Speer&';s Uni-Cor technology fully encapsulates the lead core in a seamless jacket to help reduce fouling and airborne lead. Designed for target shooting, these .40 caliber 155 grain TMJ bullets deliver reliable accuracy with consistent diameters and a uniform heel. Product Highlights Speer Uni-Cor technology fully encases the lead core for a true Total Metal Jacket (TMJ) design Cleaner shooting construction helps reduce fouling and airborne lead compared to traditional FMJ 155-grain .40 caliber projectile optimized for target shooting and high-volume practice Consistent bullet diameters and uniform heel support dependable accuracy and repeatable performance Packaged 100 bullets per box (5 boxes per case) Specs Brand: Speer Ammo Manufacturer Part Number: 4399 UPC: 076683043993 Caliber: .40 Cal Bullet Weight: 155 grain Bullet Type/Style: Total Metal Jacket (TMJ) Application: Target Shooting Material: Copper jacket, lead core Diameter: 0.4 in Ballistic Coefficient: 0.125 Sectional Density: 0.138 Package Quantity: 100 per box Case Pack: 5 boxes per case Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.