Privacy guaranteed - Your email is not shared with anyone.

Welcome to Glock Forum at

Why should YOU join our forums?

  • Reason #1
  • Reason #2
  • Reason #3

Site Description

Am I making a bomb or what?

Discussion in 'General Firearms Forum' started by SpectreRider, Aug 19, 2012.

  1. SpectreRider

    SpectreRider Armed Citizen

    Is keeping a bunch of ammo in the gun safe a good place for it or a really stupid idea.

    The safe is fire rated 1200 degrees F. for 30 min.

    I can't say I have ever seen an answer for this. If you know, please share, and Thanks!
  2. Kevin108

    Kevin108 HADOKEN!

    Mar 2, 2005
    Virginia Beach, VA
    It's safe.

    Get it!?

    But seriously, it is.

  3. janice6

    janice6 Silver Member

    Apr 4, 2006
    No. For the shell to produce the greatest force the powder must be confined for a finite amount of time for the burn to turn into an explosion.

    The release of force of an unconfined shell is in a spherical distribution and is not forced into a particular direction. I believe the force will fall off as the square of the distance similar to light. This will result in a considerable loss of pressure.

    The shell will "pop" but the bullets will be confined to the interior and the round is just "cooked" off.

    I am not a gun expert but I believe the physics of this situation will be as described.

    You are probably better off with the ammo in the safe during a fire. There is less chance of a first responder being hurt.
  4. 4TS&W


    Jul 20, 2002
    here and there...
    I ate too much guacamole at the neighborhood party yesterday.

    THAT was a bomb!

    What you're doing is actually pretty cautious (notice, I didn't say it, on account of the poster above who beat me to it...)
  5. Kevin108

    Kevin108 HADOKEN!

    Mar 2, 2005
    Virginia Beach, VA
    Yep. For a bullet to work, all or almost all of the force needs to be released straight forward in the space of a given shell. When the force is released without the directional control, it's all of the bang but only a fraction of the force.
  6. SpectreRider

    SpectreRider Armed Citizen

    OK... I looked up the combustion point for smokeless powder and the low end of the range is about 375 degrees F.

    The idea of the safe is to keep the guns from walking off in a break-in and to not burn in a fire.

    I enquired about the cost of an insurance rider to cover the wifes jewelery and my firearms and it was ridiculous. So, we bought a second safe.

    How hot is the interior of a fire safe supposed to get? Obviously less that 412, the flashpoint for paper. But is it over 375, the flashpoint for powder?

    Having rounds cook off inside the safe would surely do some serious damage to the guns.

    I would rather leave it all in the safe, but not if it is likely to get hot enough to cook off the ammo.
  7. collim1

    collim1 Shower Time!

    Mar 14, 2005
    Lets think about it...whats heavier? The case or the lead projectile?

    The projectile obviously. Without the support of a chamber the case would fly backwards with significantly less force.
  8. hogship

    hogship It's MY Island

    It's best to keep your ammo and guns seperate.........

    I guess I'm lucky to have purchased a cheap stack-on gun cabinet 25 years ago. It's been replaced with a Fort Knox gun safe about 15 years ago. The Stack-on has some shelves built into the interior, and makes an excellent lockable storage area for ammunition........


    Last edited: Aug 20, 2012
  9. jp3975


    Nov 13, 2008
    Texarkana, Tx
    They did it on myth busters. Put ammo in a normal oven and when it went off, it wouldnt even go through an oven which is like butter to most ammo comming out of a gun.

    They even did a 50bmg round.
  10. I think it depends upon how full you fill the safe with ammo.

    A few boxes of ammo in a safe and they will act like they are not confined.

    But if you fill all the available space with ammo the safe may provide the containment of pressure until it fails. In which case you would be making a bomb.

    Outdoor Hub mobile, the outdoor information engine
  11. I did the same. Bought a safe last year and then made shelves for my old Stack-on cabinet. Mine looks to have been the smaller 8 or 10 gun model, but they make really nice ammo lockers. Amazing how fast you fill it up!
  12. Glockrunner

    Glockrunner HOOYA DEEPSEA

    Sep 10, 2001
    True there would be lots of expanding gases but the safe will not contain it well enough to consider it an explosion. Even if the majority is just stored powder. Individual rounds will cook off the same without the explosion.

    Now with that said, you are going to go from what was once a cool fire to a much hotter fire with possibly some spontaneous combustion nearby also. But no explosions.

    The safe walls will act just like the shell/casings and rupture early allowing the expanding gases to release at almost instant ignition.
    Last edited: Aug 20, 2012
  13. hoghunter82

    hoghunter82 FL Glocker #182

    Jan 21, 2011
    Central Florida
    Very unsafe. I would advise that you send all of your ammo to me for safe keeping. Ha ha.

    I would NOT advise keeping fireworks in your safe, but if you do please make sure you get a video of it in the event of a fire for YouTube.

    Outdoor Hub mobile, the outdoor information engine
  14. M2 Carbine

    M2 Carbine

    Dec 21, 2002
    One sure thing about storing ammo is, there is no sure thing.

    I can't really say what would happen in the safe, except I wouldn't want to be around.

    In 1995 my small metal gun shop burned to the ground.
    Inside was over 23,000 rounds of loaded ammo, 22, .380, 9x18, 9mm, 38/357, M1 Carbine, Shotgun and rifle ammo up to 30.06. Most of the ammo was in 30 and 50 cal steel ammo boxes stacked under the wood loading benches.

    There also were a good bit of reloading components, powder and primers.

    The conventional wisdom at the time was ammo in a fire wouldn't do much more than "Pop".
    Heck of a Pop.



    Note the bullet hole through the gun powder cans, which did an excellent job of not exploding.
    There were a number of bullet holes in stuff.
    The blown up cans are WD-40 and Black Powder.

    This can wasn't actually in the fire but close enough to burn he paint and cause about 40 rounds of 9mm to blow a fist size hole in the can.
    What was interesting is the can didn't blow on the fire side.

    So, do what you think is best, but in case of a fire don't get too close to see if you are right.:)
  15. youngdocglock


    Jun 28, 2012
    :rofl: OP i thought you were gonna say that you were packing the stuff feom morning glories into tylenol bottles
  16. DragonRider


    Jun 6, 2002
    Ammo Cans are air tight, so they would explode I would think. My grab and go ammo is seperated from my boxed ammo which is in a Sandusky Cabinet.
  17. MrGlock21


    Apr 16, 2001
    North Texas
    Why would you want to use up space of a safe for ammo and not store it on cheap (lockable) shelves? :dunno:

    Ammo is not precious. Important paperwork, jewery, valuable firearms, cash etc... is.
  18. SpectreRider

    SpectreRider Armed Citizen

    Between the guns and the jewelery and documents, my wife and I outgrew the safe. After dealing with it being overcrowded we bought a second safe and moved the jewelery and documents.

    Suddenly I had lots of room in the safe. And a bunch of ammo in a cabinet elsewhere. Moved the ammo and gained cabinet space.

    Space is in short supply in my little home. If there is not a good reason not to, it makes sense to consolidate all the guns and ammo into the safe.
  19. edcrosbys


    Aug 22, 2007
    Doesn't some fire safes seal when in a fire? If you had a safe fairly full of ammo I could easily see that causing issues. This is a little different than the Myth Busters firing rounds off in the oven from heat. Don't worry so much about a single bullet, but when a large amount of rounds go off at once in a sealed container.