Paxboy:
By "full reverse" I mean whatever the EECs (Electronic Engine Controls) will give when I pull the reverse thrust levers up to the stops.
With GE CF6-80 engines and EECs in the normal mode, the EECs determine the max N1 available for current conditions. I can push the thrust levers full forward to the stops on takeoff, go-around, or windshear, or pull the reverse levers full up to the stops after landing, without fear of overboosting the engines. IIRC, the actual max reverse thrust is on the order of 80-85% max T/O thrust (around 95% N1), and net reverse thrust is about 40%.