Another way to unload the magazine safely is to...
* Place the weapon on safe.
* Press the action release and bring the fore end fully to the rear. The shell lifter will now be in the down position. A shell will be released from the magazine onto the shell lifter.
* Tilt the weapon to the side (ejection port down) and the shell will roll out of the open ejection port.
*Move the fore end forward and the bolt will close on an empty chamber.
* Repeat until the magazine is empty.
The bolt face never comes in contact with the back of the shell, and no live rounds are ever chambered, so it's a safe procedure.