4 years is certainly long enough for them to have shuffled the shells long enough in their shell game that the U.N. inspectors (if allowed back, given previous restrictions placed upon them by Iraq) would have to be inhumanly lucky to stumble upon some weapons factory somewhere.No. Chemical processing (for gunpowder) on a militarily significant scale (more than re-loading your own shells) requires decent processing equipment.
Plus, age and storage are factors. While you can throw a case of shotgun shells in your trunk over the winter, moving truckloads of munitions around requires more effort.
Storage is even more important with chemical weapons.