Product Description The Barnes Bullets Triple-Shock X Flat Base (TSX FB) in .450-400 Caliber is an elite all-copper hunting bullet engineered for dangerous and big game hunters who demand maximum terminal performance. Constructed entirely from pure copper, this flat base bullet eliminates the core-separation issues common with lead-core designs, delivering virtually 100% weight retention upon impact. The patented grooved shank reduces pressure and fouling while the multiple copper petals expand reliably at a wide range of velocities, creating devastating wound channels. Packed 10 bullets per box (50 per case), these premium projectiles are an outstanding choice for double rifles and bolt-actions chambered in .450/400 Nitro Express. Product Highlights All-Copper Construction: Solid copper body provides near 100% weight retention for deep, consistent penetration on dangerous game. Triple-Shock X Technology: Multiple relief grooves reduce bore friction and pressure, improving accuracy and reducing fouling compared to traditional designs. Reliable Expansion: Four razor-sharp copper petals open uniformly across a broad velocity range, maximizing energy transfer and stopping power. Flat Base Design: Optimized for double rifles and heavy-recoil applications chambered in .450-400 caliber, ensuring stable flight and consistent terminal ballistics. Lead-Free Performance: 100% lead-free construction meets lead-free hunting regulations in all applicable jurisdictions. Specs Brand: Barnes Bullets Bullet Type: Triple-Shock X Flat Base (TSX FB) Caliber: .450-400 (450/400 Nitro Express) Quantity: 10 per box / 50 per case Construction: All-copper, lead-free UPC: 716876410859 MPN: 30514 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. ]]>