The shooter will cause himself to be struck. Easier ways to get electrocuted

Annoying bug. Some komd of memory leak.

Laser beams ionize particles in the air . Ionized particles are conductive. As they are lined up, they form a path.

In order to force a lightning strike you need to bring the charged particles closer together, increase conductivity of the air or increase the amount of charged particles. If a bullet can do any of this, it may cause a lightning strike