Federal Speed-Shok, Lead Free, 12 Gauge 3.5, #4, 1 3/8 oz, Steel Shot, 25 Round Box, California Certified Nonlead Ammunition WF133 4 Speed kills, now it stops even cleaner with redesigned Federal Speed-Shok. Its high-performance primer and fast-burning powder dramatically reduce residue, while its optimized velocities knock birds out of the sky.