Product review (5 stars): 50% is good if you have wood stocks
Used in gun safe.  After researching, somewhere between 30-50 seems to be the ideal humidity for a gun safe.  50% is good if you have wood stocks.  I do not, so I'm shooting to 30.  It was interesting to see with the door shut, the inside humidity actually goes up compared to the room the safe is in.  Just installed a Peet dehumidifier per friends recommendation.  Using desiccant dryers does not seem help.  Desiccants are keeping the safe around 40%, which is ok, but are turning pink fast. The rest of my house is around 35-40%.