Winchester Deer Season XP 308 Winchester Ammo 150 Grain Extreme Point Polymer Tip Lead-Free ammo review offers the following information; The Winchester Deer Season XP Ammunition line combines decades of Winchester experience into the perfect choice for deer hunting ammunition. Accuracy, combined with massive bullet impact performance means that Deer Season XP is a great choice for all deer hunters. The large diameter polymer tip accelerates bullet expansion for rapid trauma upon impact, while the streamlined ballistic profile optimizes the bullet’s downrange performance. This load was built specifically for deer hunting and taking down big bucks. Deer Season XP Copper Impact rifle ammunition provides devastating terminal performance on deer with outstanding weight retention and deep penetration. Like the original Deer Season XP, Copper Impact features a large-diameter polymer tip and engineered hollow-point bullet that initiates rapid expansion on impact. What differentiates Deer Season XP Copper Impact is the solid copper bullet design that offers improved weight retention for deeper penetration and a red, reinforced polymer tip for product differentiation from standard Deer Season XP loads.