Nosler's E-Tip is advanced polycarbonate tip initiates expansion while delivering unsurpassed penetration and weight expansion. The exclusive Energy Expansion Cavity provides a dual- expansion chamber for amazing stopping power and uniform expansion with 95%+ weight retention for superior penetration. Solid copper alloy construction one-piece design meets California's new "lead free" hunting restrictions. Boat tail design provides a more efficient flight profile for increased long-range performance.i