I have a friend that use to oil up a gun to the point it was dripping. I accused him of dipping them in a 55 gal drum.

I store most of my firearms muzzle up but to make room in the safe I set in a row muzzle up and another row muzzle down either just between or just in front. With 30 & 32" guns to the back and 26"-28" to the front, let's the heel of the stock cradle between the barrels of the rear gun. It doubles the capacity of the safe. Also instead of carpet (which I feel can hold moisture) I line the bottom of the safe with cork. 1/8" -3/16" flooring cork works excellent.