Military box of 130 grain 38 Special, LOT PCC 36000

Anyone know the reason for the warning on the side of this box of what I assume to be M41 cartridges?

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My very feeble guess: A very weak attempt to keep this particular ammo from being pilfered. I know from ANECDOTAL evidence only that a lot of this particular cartridge “walked off” of our bases back in the day.
Taber