300 Win Mag Federal Barnes TSX 165gr 20rdsFederal Premium . 300 Win Mag 165gr Barnes TSX is a lead free hunting load built for maximum penetration and weight retention. The 100% copper Barnes TSX bullet creates four razor sharp cutting petals on expansion, driving through tough bone and tissue while retaining nearly 100% of its original weight. An excellent choice for elk, mule deer, and large game where deep, reliable penetration is critical. New production, non corrosive, boxer primed,