I admit, this little fact does make my plan a bit unreliable, but I seem to regularly find C4 in military bunkers, and I usually burn up ammo to break in since Military IDs are a bit rare.
Unfortunately, my recent adventures seem to involve a great deal of mishandled explosives, landmines, and “You fumble at the controls x10”.
This usually results in me being dozens of tiles away from where I wanted to be, missing several limbs, bleeding, swimming in acid, blind (or boomered), and being surrounded by hundreds of zombies, not necessarily in that order.