Gun safe fire ratings: who measured the number on the sticker?

"Gun safe fire rating" is one of the most-searched phrases in this category, and the honest answer is awkward: the ratings exist, they are usually not fabricated, and they are also usually not comparable. Two safes advertising 60 minutes may have been measured on different furnace curves, to different interior temperature limits, by people with different incentives.

We do not test safes. Everything below is drawn from manufacturers' published specifications and the certification bodies' own descriptions of their marks, checked 2026-10-17. Each product we cite carries a dated CPSC recall search on its card.

The short version

Why gun safes so rarely carry a UL fire class

A gun safe is a large box that has to resist prying. Document safes achieve their fire classes with poured amalgamate or thick gypsum in a small, sealed shell; a gun safe uses one or two layers of fireboard inside a formed steel body with a door gap big enough to swing a 500 lb door. Getting a large body through a UL 72 classification is expensive, and the market does not reward it: buyers compare minutes, not classes.

So brands test in-house and advertise the result. That produces the pattern you see across our registry: the same brand will have a UL-listed lock and a UL RSC burglary listing and still describe its fire performance in its own words. Liberty is the clearest example, calling the Franklin's 110-minute figure "certified" without naming who certified it.

Comparing claims side by side

That table contains the whole argument of this page. The AMSEC BFX6030 claims 120 minutes at 1,200°F and says ETL verified it. The Hollon Republic RG-22 claims 120 minutes at 1,400°F, a higher temperature, and names nobody. The Steelwater HD593924 goes further still, 2 hours at 1,875°F, also unverified.

Read that the way a buyer should: the unverified numbers escalate because nothing stops them escalating. That is not an accusation against any particular company, it is what happens in a market where the measurement is self-reported. When the figure is verified it tends to be more modest, and the modest verified figure is worth more.

How to check a fire claim yourself, in two minutes

1. Find the sentence, not the badge. On the maker's own product page, look for who performed the test. "UL classified," "ETL verified" and "tested by Intertek" are claims about a third party. "Certified," "verified," "tested" and "rated" on their own are not.
2. Check the temperature and the interior limit. A rating with a duration but no furnace temperature is not a rating. One Hollon series page in our registry states 75 minutes with no temperature at all.
3. Search the certifier's directory. UL's certifications database and Intertek's ETL Verified directory are public. If a listing exists, it is findable.
4. Ignore the fire picture on the listing. Stock imagery of a safe in flames is marketing, and an unverified claim with a dramatic photo is still unverified.

What a gun safe fire rating covers, even when it is real

A fire rating is a statement about interior air temperature over time. Four things it does not tell you, all of which matter in a real house fire:

• What the walls reach. The rating is measured at points inside the interior; the inner surface of the wall runs hotter. Contents pressed against the walls do worse than contents in the middle.
• What water does. Firefighting puts a great deal of water into a house, and almost no gun safe carries a water rating. See are gun safes waterproof.
• What happens if the floor fails. Document safes are sometimes impact tested; gun safes almost never are. A safe on a ground floor above a basement may end up in the basement.
• Whether the lock survives. An electronic lock is a circuit board and a motor on the outside of a hot door. A safe can hold its interior temperature and still need drilling to open afterwards.

The deeper point is the one we make in are fireproof safes really fireproof: no safe is fireproof, every rating is a clock, and how long you need depends on your house, your contents and how fast your fire service arrives.

Safes in our registry with a verified fire rating

What a fire rating means for ammunition in the safe

This is the question buyers ask least and should ask most. SAAMI's published storage recommendations are for cool, dry storage in original cartons, away from heat sources, and a safe interior in a house fire is the opposite of cool. Two practical consequences:

• Do not treat the fire rating as permission to store large quantities of ammunition in the safe. The rating describes the interior temperature, not what the contents do at that temperature.
• Keep ammunition in sealed cans, separately where you can, which is also the right answer for humidity and for child access. See how to store ammo long term and best ammo storage.

The checklist

1. Who tested it? Name a lab or treat it as a maker claim.
2. What temperature, for how long, to what interior limit?
3. Is there a burglary listing as well, and is it a UL RSC? Fire and theft are separate tests.
4. Is there any water rating? Almost certainly not, so plan for it.
5. Will the papers go in a UL-classified chest inside the safe instead? Usually the better answer.

If you want the shortlist rather than the method, best fireproof gun safes ranks the category on exactly this evidence, and fire rating vs burglary rating explains why one safe rarely leads on both.