Winchester's proprietary bonding process welds lead to a copper alloy jacket where the two act together during expansion for improved penetration and retained weight. The bonding technology improves bullet performance with increased retained weight and deeper penetration, while still providing a quick and lethal knock down. Protected hollow point PHP design. Lead core bonded to jacket with proprietary process. Massive frontal area of mushroom is more than double original diameter. Lead remains bonded to jacket after impact.
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