Federal Fusion 45-70 Governm. 300 SPFusion was the first rifle ammunition specifically built for deer hunting—and it’s still the best, offering the largest expansion and highest weight retention in head-to-head comparisons against the competition. With a molecularly fused jacket and a pressure-formed core, Fusion transfers maximum energy on target.Copper jacket is electro-chemically applied to the core, resulting in a perfectly uniform jacketExcellent accuracySkived, pre-programmed nose provides consistent expansionMaximum weight retention for deep penetration