I have had 3 Remington rifles and a Sako rifle have unplanned discharges.One was in my pickup (Rem 722) with muzzle in the floorboard.One was while unloading that same rifle in my office,and the other was my Mohawk 600.All were while closing the bolt.I have fixed the problem with the Mowhawk 600,but the 722 just sits even though I can't make it do it again,but just don't trust it.The Mohawk 600 was just a very dirty trigger mech.The 722 trigger has something definitely wrong with it internally.The Sako discharge happened while hunting and it has been fixed.The complete rifle had been hot blued and the trigger had not been properly mounted to the action.Cleaning it and loktiteing the screws and aligning it better,than what it was, fixed the problem.
It is very important to always have the muzzle pointed in a safe direction,NO MATTER WHAT,when handling a rifle or any firearm.