Federal Fusion, 357MAG, 158 Grain, Hollow Point, 20 Round Box F357FS1 Demand more from handgun hunting loads. Fusion(R) Handgun features the same molecularly fused bullet construction as its rifle counterparts for the toughness, accuracy and terminal performance short-barrel hunters need. The loads' bullet weights and velocities have also been optimized to be lethal on deer without punishing the shooter.