[SnakePleskin]

I just took my 25K rounds out of the .50 cal military ammo boxes they are stored in. I throw some desiccant in each box, then seal them the normal way. I opened them last week after three years in the garage. Each can I had to break the air seal with a screwdriver, you could hear the suction! The ammo was in prefect pristine condition. Each can holds between 3500-4000 rounds depending on size of brick or individua boxes! I love the .50 cal ammo boxes!

 

[SnakePleskin]

Yeah, I'm not convinced that in practical situations it would often make much difference. Plus there are drawbacks to storing such materials in metal containers that have their lids or doors clamped closed. If you want to see some of those issues in more detail, take a look some time at the BATF regulations for storing black powder -- and all the disputes about whether and to what degree those apply to individual owners/users or only to commercial sellers. But in any event, each of us has to make that choice for himself.

Using a GI .50 cal can is an excellent method for storage. They seal tight and take abuse. That is why the military used them! Its like a Russian or Eastern Block Spam can. Ammo lasts virtually forever! I bought a crate of Yugo 7.62x39 brass ammo. Sealed in tin covered blocks, two to a crate. We are talking 1970's production! Ammo was perfect! I use them for BP too , but lined them with cardboard ,Styrofoam, or rubber flex seal, to stop static etc. Works fine.