Extract the tightest most efficient patterns from Rob Roberts Raptor Series chokes. Federal collaborated with Rob Roberts and his team to develop these customized loads which pair heavy payloads and high shot counts with carefully selected velocities proven to put more pellets on target. The loads combine Federals highperformance primers and cleanburning propellant to deliver lethal shot strings through the advanced Raptor choke design.Dirtnap 22Creedmoor 77gr 20 Per Box