Powder storage?

[tommyrott]

I have recently moved to a different state and altitude recently and have my powder stored in original containers and have noticed that some of the one pound bottles have slightly collapsed, all of them being unopened. I opened one up and smelled to see if there was a difference, which I did not really think there was. Just wondering if it might have been the change in altitude which might have caused this? Use to live at 6500 now I am at 300. I have had most of the powder for about 5-9 years stockpiled

[Ryno12]

It was likely the altitude change that caused the collapse of the jugs. Air pressure is lower at the higher altitude so when you moved to a lower elevation, the air pressure inside the jugs is lower than the outside atmosphere.

Open them up & let them equalize.

[Eric D.]

That'll do it.

Use to live at 6500 now I am at 300.

[tommyrott]

Thanks, figured that was the case. Would have been more worried if they were bulging and smelled rancid

[G woody]

The one can of powder I've ever had go bad was very obvious when I opened the can (IMR 4895) that I had no doubt. Redish brown in color & very dusty. Nasty stuff, for sure.

[tigershilone]

6500' to 300' MSL = about a 3 PSI difference, more than enough to push in a plastic powder can. Won't hurt it though.

[Bimmer]

I thought that plastic powder containers were sealed?

Are they not airtight?

Or is it that there's long-term seepage, and his powder containers all acclimated to 6,500 feet, and only collapsed when he suddenly moved to 300 feet?

[tylerw02]

I thought that plastic powder containers were sealed?

Are they not airtight?

Or is it that there's long-term seepage, and his powder containers all acclimated to 6,500 feet, and only collapsed when he suddenly moved to 300 feet?

That hasn't been my experience at all. They are somewhat sealed, but certainly not airtight.


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[tylerw02]

Yeah they have an aspirin bottle looking "seal", but it isn't airtight. It's a piece of foam.


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[lowprone]

Keep powder in cool , dry place away from direct sunlight should last a very long lime.
I have what is left of one of the old cardboard 8lb containers of Bullseye and the powder
is still producing accurate loads.
Must be 20 years at least.