Every serious gun owner should already have a primary gun safe in the home. A heavy, armored vault that will defeat determined, if not expert, thieves with a crowbar or cordless drill and the time to use them. In addition to safeguarding the rest of your collection, such a safe is where you keep the Big Gun, a shotgun or carbine of decisive firepower which is too big to keep handy next to your bed. These big safes are great, but . . .