Precision. Penetration. Power. An Innovative Winchester Polymer-Tipped Slug that Delivers for Hunters. The XP3 tin-core slug is built for greater expansion on impact and is extremely lethal. It includes a polymer tip for improved down-range ballistics as well as a patented sabot design for high accuracy. The XP3 slug sets the standard for hunting and embodies the quality and innovation that Winchester is known for worldwide. This lead-free slug is for use in fully-rifled barrels only.