A two piece booster shot shell wad is disclosed which includes a one piece wad unit and a shot cup. The shot cup is received in a cup shaped cavity in the one piece unit. The shot cup has a non-circular stud on its bottom and is received in a non-circular recess on the one piece wad. The one piece wad has a channel on its bottom to trap air and direct it against the bottom of said shot cup to expel the shot cup from the one piece wad. The over powder wad shapes the charge and extended primer flash pocket helps in ignition of the powder. The outer peripheral upper edges of the cup shaped cavity in the one piece unit is flared outwardly to build up air pressure for opening the ears of the one piece wad and the shot cup has spaced ears which flare outwardly in flight through the air.
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