The HEVI-Steel flies at 1500 fps,compared to competing fast steel loads, which run at 1450 fps. This increase in speed delivers 9% more energy at 30 yards and 8% more energy at 40 yards. In short, you get more knockdown power and fewer crippled birds. Clean burning powder and precision manufactured premium steel shot are loaded to Environ-Metal, Inc's exacting loading standards. The Hevi-Teal features a selection of HEVI-Steel shells with smaller pellets for a very high pellet counts, more open patterns, and plenty of knockdown power at high velocity, ideal for teal hunting.