The Barnes Triple-Shock X-Bullets in 8mm (.323 caliber) deliver exceptional hunting performance with their revolutionary 100% copper construction and 200 grain boat tail design.Barnes Triple-Shock X-Bullets - 8mm (.323 inch diameter)200 grain boat tail design for superior ballistics100% copper construction - lead-free ammunitionExpands into four razor-sharp petals upon impactRetains 100% of original weight for maximum penetration50 bullets per boxOptimal seating depth: 0.03 to 0.07 inches from riflingEngineered for hunters who demand reliable one-shot performance these bullets penetrate dense bone and tissue while maintaining deep cutting capability. Ideal for big game hunting where maximum stopping power and weight retention are critical.