Laser bullets

We're all used to energy clips and laser rifles as standard scifi weapons. When the energy clip runs out one that fully charged is put back in its place. But what if instead of energy clips conventional clips with laser bullets are used? The bullet being a one time charge for a blast.

Imagine a much simpler, chemical based laser blaster that uses bullets to power each blast. There are no electronic components which may be susceptible to EMPs. The bullet is triggered and a reaction takes place inside that powers the laser device. Once used, the casing is expelled and another one put in to fire the next laser blast. The chemical could be something characters could carry in a pack and could reload the casings with.

Thoughts?