The Barnes Triple-Shock X-Bullets in .338 caliber (0.338'') feature revolutionary 100% copper construction with 250-grain flat base design engineered for superior big game hunting performance.Barnes Triple-Shock X-Bullets - .338 Caliber 250 Grain100% copper construction for consistent performanceFlat base design for enhanced accuracyExpands on impact to create four razor-sharp cutting petalsRetains 100% of original weight for maximum penetrationPenetrates dense bone and tissue effectively50 bullets per boxOptimal seating depth: 0.03 to 0.07 inches off the landsDesigned for hunters who demand reliable one-shot performance on big game these premium bullets deliver exceptional accuracy and terminal ballistics for the most challenging hunting situations.