Barnes Triple-Shock X-Bullets in .375 caliber (0.375'') deliver revolutionary performance with 100% copper construction and 350 grain weight in a flat base design.Barnes Triple-Shock X .375 Caliber bullets 50 per box350 grain flat base design for optimal ballistics100% copper construction - no lead coreExpands to create four razor-sharp cutting petalsRetains 100% of original weight for maximum penetrationPenetrates dense bone and tissue effectivelyRecommended seating depth: 0.03 to 0.07 inches off landsEngineered for hunters who demand reliable one-shot performance on big game these bullets combine deep penetration with controlled expansion for ethical effective hunting results.