I think that most of the gun “safes” on the market are there to discourage the crime of opportunity type burglars.
I could “peel” one of those safes open in less than ten minutes.
My neighbor bought an old payroll safe at an estate auction a while back. Luckily, it came with keys and the combination, and you need both to open it.
2 plus inches of heat treated high carbon steel, and at least an inch of refractory on the inside.
Rockwell “C” hardness on the outside is 54-58.
And it is fricken heavy.
Just here to say, that an open Liberty safe was thrown away to the side of the street here (following Hurricane Irma). A neighbor was trying to load it on a strong dolly, but couldn't move it. It was to replace his lesser safe.
Probably thrown out for insurance-money, and why I won't support insurance companies to insure my house. Why should my premiums help pay for such wastrel?