What is the Average Storage Life for Ammo?
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Old 05-30-2007, 05:37 PM   #1
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Default What is the Average Storage Life for Ammo?

I am curious, how long does ammo last if stored in temps of about 75 degrees F? I've heard twenty years, but this seems like an awfully long time to me. Thanks.

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Old 05-31-2007, 01:01 AM   #2
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If the storage was dry, it'd be a lot longer than 25 years. Although "average temperature" can be a tricky thing. If it was stored at a temp of 150°F for 6 months, then at 0°F for 6 months, that's an average of 75°, which might be a bit more deleterious than a constant temp of 75°.

In the late 70's and early 80's my regiment used ammo in our retired BREN guns that came in cases marked "NOT FOR USE IN SYNCRONIZED MACHINEGUNS AFTER 1927", IIRC the headstamp was from 1917.

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Old 05-31-2007, 02:00 AM   #3
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Quote:
Originally Posted by Splatter View Post
If the storage was dry, it'd be a lot longer than 25 years. Although "average temperature" can be a tricky thing. If it was stored at a temp of 150°F for 6 months, then at 0°F for 6 months, that's an average of 75°, which might be a bit more deleterious than a constant temp of 75°.

In the late 70's and early 80's my regiment used ammo in our retired BREN guns that came in cases marked "NOT FOR USE IN SYNCRONIZED MACHINEGUNS AFTER 1927", IIRC the headstamp was from 1917.
I'v some german 9mm marked 1917 and various 8mm from the 60s and greek 303 boxer primed from the 70s
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Old 05-31-2007, 05:01 AM   #4
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If kept in a sealed container, at room temperature in low humidity (a house with A/C will do nicely) conditions, ammo should outlast it's owner. I have ammunition I got in the 70's and 60's that is still as good as the day I purchased it and I've used surplus ammo from WWII that fired with no problems.

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Old 05-31-2007, 11:31 AM   #5
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I shot some Twin Cities .45acp that was dated from 1944 a few years ago. It shot just fine after being stored for at least 50 years in a shed with no climate control (this is in the Mississippi river valley where heat, humidity, and cold vary to the extreme). As long as it is decent ammo, and kept dry most ammo will keep for many decades if not over a century.

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Old 04-28-2014, 03:08 PM   #6
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I have surplus .762 Match ammo dated 1966 that I shot a few weeks ago. I hit in the black consistently at 600 yards and had two X's (4 inch X Ring) with iron sites on a CMP M1 Garand that wasn't glass bedded. Iron Match rear site. I have shot .45 ammo that was labeled "REPACKED 1944". It was dirty compared to todays powder but accurate. Notice that there is no
"SHOOT BY ----" date on ammo





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Old 04-28-2014, 03:12 PM   #7
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Ammo, when stored correctly will last a lifetime or two. store them in metal Ammo boxes.

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Old 04-28-2014, 03:21 PM   #8
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If you store ammo in an a climate controlled area it will last a long time. I have found old ammo. I have no idea of how old it was and it all went bang.

The worst place to store ammo is in a car. The ammo takes a beating and it is exposed to wild temperature swings. If I leave ammo in my truck for a long period of time (six months or more) I do not trust it.

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Old 04-28-2014, 03:34 PM   #9
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I know a guy who found about 20 rds of 5.56 ammo in a creak bed. It was all green and tarnished. he fired them and they shot good. I was amazed.

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Old 04-28-2014, 10:39 PM   #10
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WW II surplus ammo works fine today if stored in sealed containers. I have shot ammo I loaded 30 years prior and stored in GI ammo cans

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