"HOW I PREP AMMO FOR LONG TERM CACHING and STORAGE".
I use ammo cans. They are first lined with three trash bags. I
then mix 5.56X45 and .22LR cartridges in a large bowl
(Mixing the smaller .22LR helps fill the space between the
5.56 which reduces the amount of air).
When well mixed, I fill the ammo CANS over the top, shake
the can, shake it some more, fill as necessary. Set the can
on a electric room heater, with a towel over the top. The
objective is to heat the cartridges and the air inside the
can at a "Safe " heat level.
I shake some more to settle the cartridges. At some point I
trim the trash bag to about 6" above the can, and roll each
bag to seal out the air. I then close the lid, and quickly
start wrapping the can in many wraps of shrink wrap, to
ensure that no air can get to the outside of the can.
I sometimes add two more trash bags over the shrink wrap,
and then shrink wrap again. I then spray paint this with two
or three earth colors to camo. I then look through my rag
bag to find cotton fabric that is some earth tone, the shell
of out used up sleeping bags are cotton duck material and my
preferred final wrap.
The result is now ready to cache.
FOLLOW-UP Note: In the future I am going to add heated very dry sand to the package, before closing. The goal being push even more air out.