The issue with Liberty and all other gun safes is that they have a limited TL rating; you don't usually see a TL rating on residential gun safes, only a RSC (Residential Security Container). They offer limited resistance against a tool attack (attempted burglary/robbery).
Safes that are certified as burglary-resistant bear the metal label of Underwriters Laboratories Inc.
The UL’s rigorous testing is conducted by burglary experts using a variety of devices, including diamond grinding wheels, high-speed drills with pressure-applying devices, carbide-tip drills, and hand tools such as hammers and chisels. The tests are conducted under ideal laboratory conditions, unlike those a real burglar usually encounters. Security experts say it could take a typical burglar as much as three or four times longer to crack a UL-tested safe. Thus, the UL rating represents the minimum protection a safe is certified to provide.
Underwriters Laboratories uses 10 classifications or ratings for burglary-resistant safes. They are, in increasing order of protection: TL-15; Deposit Safe; TL-30; TRTL-30; TL-15X6; TL-30X6; TRTL-15X6; TRTL-30 X6; TRTL-60X6; TXTL-60X6. Each letter and number of the rating code represents a different aspect of security that the safe provides.
Burglar’s tools. TL means a safe is tool-resistant, TR means it’s torch-resistant, TRTL indicates that it’s tool- and torch-resistant, and TXTL stands for torch-, tool-, and explosives-resistant.
The highest rating is the TXTL safe, which is rated against an attack using explosives. Very few safe manufacturers made these and I believe only one manufacturer still makes them. If you have to have the ultimate in security (short of buying a bank vault from Diebold), you'll buy a Chubb. You'll also pay out the ass for it.
Extent of resistance. The numbers 15, 30, and 60 represent the number of minutes a safe will withstand a series of attacks. The longer a safe can resist a break-in, the more likely it is that burglars will flee and that police or security guards will arrive before any jewelry is stolen.
Sides of a Safe. X6 means a safe provides equal protection on all six sides (including top and bottom). When X6 isn’t listed, it means the safe provides protection only on its front face and door.
Thus, a TRTL-30X6 UL rating means a safe is certified to resist entry from torch and tools on all six sides for a half-hour. A TL-15 rating means a safe can resist physical attack from tools to its front face or door for 15 minutes. TXTL safes do not have a numerical rating.
For RSC rated safes, Browning is a good safe, as is any safe made by Amsec. Liberty Safes are good against fire and the average burglar. The higher end safes made by Liberty Safe (Lincoln, National, Presidential) have thicker bodies, as do their cousins from the National Safe Company (which was purchased a few years back by Liberty Safe Company). If you want a commercial safe that is rated for TRTL-x, you can get one that is used and reconditioned at a reasonable price and comparable to what you would pay for a residential gun safe.
Uncle Duke