Product Description Underwood Ammo 648 10mm Auto delivers high-performance hunting and self-defense capability using Lehigh Defense-designed Xtreme Penetrator bullets. This solid copper (lead-free) monolithic projectile features a unique nose profile engineered to maximize deep, straight-line penetration while promoting consistent and reliable magazine feeding. Built with nickel-plated brass cases and flash-suppressed powder, it&';s a premium choice for shooters who demand dependable performance in low light and harsh conditions. Product Highlights Xtreme Penetrator solid monolithic copper projectile for deep, straight penetration and barrier performance Lead-free, precision CNC-machined solid copper bullet design Nickel-plated brass casing for improved feeding and enhanced corrosion resistance Flash-suppressed powder helps preserve night vision in low-light defensive use New production, non-corrosive, boxer-primed and reloadable brass cases Specs Brand: Underwood Ammo Manufacturer Part Number: 648 UPC: 816874020071 Cartridge: 10mm Auto Bullet Weight: 140 gr Bullet Type: Xtreme Penetrator (solid monolithic) Bullet Material: Solid copper (lead-free) Case Material: Nickel-plated brass Muzzle Velocity: 1500 fps Muzzle Energy: 700 ft-lbs Rounds Per Box: 20 Boxes Per Case: 10 Reloadable: Yes (boxer-primed) Corrosive: Non-corrosive 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.