I cant see that placing as a basis of compariosn, since that could happen to any rifle. Looks like someone should have oiled his rifle. I bet mine doesnt look like that.
Actually oiling a trigger assembly is not a good idea as it attracts dust that willgum up the assembly.Oil can also freeze in very cold weather,again,not a good situation for a trigger.
Out of curiosity,how many wildernesshunts have you been on where you lived out of an unheated tent for a week or more with frequent rain.All that you can do is wipe off the outside of your gun and clean it properly when you get home.If you take the action out of the stock every night to clean the trigger assembly,the point of impact can be effected.Unfortunately most people have never hunted under such conditions and simply don't understand.By the way,the other rifle used on the hunt,a model 70 functioned just fine although it was exposed to the same conditions.