Great advice^^^^^^. When they say its a 20 gun cabinet you will be lucky to get 10 guns in it. They carefully select guns that will fit perfectly to validate their claims. In reality with scoped guns, bolt guns (bolt handle gets into the other gun slot) you will not be able to fill all of the slots available.You will always run out of room. lol
It seems that a lot of safe manufacturer's now days build them with consideration for shelving vs gun storage.
We are using our first safe for document storage now because we ran out of room for guns.