Upon impact, Nosler’s exclusive E-2 Cavity (Energy Expansion Cavity) allows for immediate and uniform expansion, yet retains 95 percent weight for improved penetration. The E-2 Cavity provides amazing stopping power and peerless penetration over a broad spectrum of impact velocities, rivaling even the highest quality lead-core bullets. Signature OD Green Polymer Tip – Nosler advanced polymer tip initiates expansion while delivering unsurpassed penetration and weight retention. ECR – The Expansion Control Ring insures controlled expansion at a wide range of velocities and conditions, making the E-Tip very versatile. Cavity – The exclusive Energy Expansion Cavity provides a dual-expansion chamber for amazing stopping power and uniform expansion with 95 percent/plus weight retention for superior penetration. Solid Copper-Alloy Construction – Nosler one-piece design meets all “lead-free” hunting regulations. Boat Tail Design – Boat tail configuration combines with the streamlined polymer tip for extreme long-range performance and for easier loading.