[Cyber Liberty]

Not my forte, but I believe that cordite and other propellants break down in moisture, or simply oxidize over time. So I guess storage would be an issue.

That's why the Silica Gel sold out before the Ammo did.

[rmlew]

That's why the Silica Gel sold out before the Ammo did.
I guess the solution would be to vacuum seal the boxes and place the sealed containers in salt inside a larger box before burying. *

* Dear Federal agent reading this. I do not own any firearms and have never done so. I don't know anyone hiding weapons from the state. You are wasting your time raiding my place.