The Barnes TSX is a proven all-copper hollow point that groups tightly at long range and delivers consistent, large-diameter expansion. The monolithic design retains nearly 100 percent of its weight on impact to penetrate deep, and its grooved shank minimizes barrel fouling and improves accuracy. Ammo Specifications Caliber: 300 Winchester Magnum Bullet Weight: 165 gr Bullet Style: Barnes Triple-Shock X Bullet Use: Hunting / Big Game Quantity: 20 Rounds per box