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Old September 19, 1999, 10:25 AM   #1
Bob A
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Join Date: September 11, 1999
Posts: 6
Does anyone know if there are any adverse effects of freezing temperature on factory ammunition? I know moisture is a culprit.
Thanks, Bob
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Old September 19, 1999, 04:40 PM   #2
Art Eatman
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Join Date: November 13, 1998
Location: Terlingua, TX; Thomasville, GA
Posts: 24,125
Freezing, as in left in freezing temperatures for a winter's storage?

About all I can say about temperatures and loaded ammo is if you work up a max load at, say, 70 degrees ambient during your shooting/testing, they'll shoot a bit lower in cold-weather hunting, and maybe flatten primers on a hot summer day. Generally, unless you're pushing the envelope the latter is not really a problem. The first case might cause a low shot on that 6x6 elk.

I have read--and believe--that storage of your ammo or reloading powder in 90 to 100 degree temperatures for a long time is detrimental; the chemical decay reduces the power. But cold? I don't know, but I don't think it would hurt, from a chemical decay standpoint.

I'll defer to anybody who's more up on it...

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Old September 23, 1999, 09:37 AM   #3
Bob A
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Join Date: September 11, 1999
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Thanks, I live in usually around freezing temps during winter, but it can dip for a month or so to 5-10 degrees. I presfer keeping ammo in the garage for room sake but I haven't yet.
Thanks, Bob
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Old September 24, 1999, 12:19 AM   #4
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Join Date: April 2, 1999
Location: U.S.A.
Posts: 566
I've left ammo in truck overnight in freezing
temps and when brought inside it sweated,
I'm sure extreme temps could cause excessive
pressure,but I wonder if shooting ammo that
is frozen what would happen, must have happened in many wars, but they do collect
moisture when unfroze,:}
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