Royal BlueSteel Magnum 20-gauge cartridge is the perfect shotshell for wetlands, where greater knock-down power, high velocities, and, most importantly, non-toxic ammunition is called for. This 20-gauge Royal BlueSteel Magnum is manufactured with consistently spherical steel shot, offering velocities of up to 1,400 fps, and incredible knock-down power for bringing down high-flying ducks and geese.