The safest routine I have come up with is to use BOTH hands and while my right hand applies constant pressure to the rear trigger, very gently put pressure on the front trigger with the left forefinger and then release the back to "unset" the trigger.

Bad news is that you must remove your hand from the forend, loosing directional control and any screwup may cause the rifle to fire--
That is releasing the rear trigger too soon,or pulling back to hard on the front trigger or some other variant of the above.

Basically you have to be methodical and CAREFUL AS HELL, or the rifle may go off unexpectedly.My buddie GD is a believer!!