Federal Fusion, 45-70 Government, 300 Grain, Bonded Soft Point, 20 Round Box F4570FS1 Fusion(R) 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.