If you’re standing *very* close to a fire where some ammunition is cooking-off, you might get hit by a sliver of brass from the exploding cartridge case. Maybe. It’s very unlikely that you’d get hit by the bullet, as the heavier part of the cartridge it won’t move more than a few feet when the powder ignites under those circumstances. Metallic cartridges and shotgun shells need to be contained in a firearm’s barrel and chamber in order for projectiles to go “flying”.
If you’re standing *very* close to a fire where some ammunition is cooking-off,
Pfft. I was talking about potential hazards of ammo in a house fire (though not apparently you). Try "cooking-off" a few thousand rounds of ammo standing *very* close, or even *not-so-very* close. Or standing not far enough back from cooking-off a few pounds of gunpowder.
Boom.
Or
BOOM.
