Chest contents seems to be somewhat random. I was in the middle of looting, inspecting the glorious treasure i had just found when i got rammed from behind by a boar. After i'd reloaded and returned to the chest the contents was different.

If it is scaled then i imagine chests with harder locks will have better loot.

Also, i'd hope that such chests fall under a "random crap" class or something and there are still chests with specific loot.