Winchester Prairie Storm Choke Tubes The unique FLITECONTROL wad in Prairie Storm Ammunition will deliver inconsistent patterns in ported chokes or when used with wad stopping or stripping devices. This choke uses a special field-tested constriction and length to get the most from Federal Premium Prairie Storm Ammunition. Carlson’s Titanium Coated choke tube allows Federal’s special FLITESTOPPER lead pellets and FLITECONTROL® wad deliver devastating downrange patterns. This choke performs equally well when used with lead, copper, nickel, Hevi-Shot and steel shot loads. Carlson’s Prairie Storm™ choke tube is a proven performer on pheasants and upland birds using all lead and steel shot loads over extended distances. Note: The Early Season choke tube is a Light Modified constriction All sizes and speeds of Steel shot may be used in either choke tube. - Caliber: Winchester 12 Gauge - Constriction: Early Season