Federal Premium Prairie Storm FS Lead ammunition uses the rear-opening FLITECONTROL FLEX wad and a mixed payload of standard pellets and FLITESTOPPER lead to produce full, consistent patterns through any upland choke. Excellent retained velocity and energy mean increased lethality and fewer lost birds. FeaturesFLITECONTROL FLEX wad and FLITESTOPPER pellet systemPayload mix of 70 percent standard copper-plated lead and 30 percent FLITESTOPPER lead produces even edge-to-edge patternsFLITESTOPPER pellets create bigger wound channels