Is this a moisture problem or something else? Interestingly, only my 3 boxes of 45 Blazer Brass have this problem. Every other box of ammunition in my safe is normal.




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My guess is moisture combined with whatever mild acid is in the cardboard.

I don't know the cause, but I have had Blazer brass cartridges that looked like that. They all fired just fine.

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Or something like that . . .

Probably nothing more than minor surface corrosion. I would not be concerned.

My 9mm blazer brass looks like that too.

Nothing wrong. Manufacturers wash cases before they are loaded and polished before packaging. I think that sometimes they'll skip the polishing process. I see this often with Speer products the most.

I shot a bunch of .223 like that yesterday without a hiccup.

Thanks for the reassurances everyone! Guess I'll go load em up.


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Fear not! After you shoot it you can tumble it and it will look as good as new if and when you re-load it.

I was in the ammo business for 25 years and his is what we saw from brass suppliers that were based in very humid areas.

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Captain