A gun safe combines the sheer weight problem of any safe with legal requirements around firearm transport, since most states require secured, unloaded transport of firearms separate from ammunition. Handle both the hardware move and the legal side before loading day.
Pro tip: Call ahead for the combination or key backup location before moving day; a jammed or forgotten combination on a safe that just got jostled is a common and expensive lockout.
Watch out: Transporting a loaded firearm, or firearms and ammunition together in violation of your state's law, is a legal risk on top of a safety risk.