I began thinking about the volitile nature of firearms (esp. period firearms) and considered the spark cantrip. The "unattended" requirement bothered me, so here's a new spell:
Dammed Barrel
School evocation [fire] Level bard 3, cleric/oracle 4, druid 4, sorcerer/wizard 4, witch 4
CASTING
Casting Time 1 immediate action
Components V or S
EFFECT
Range medium (50 ft. + 5 ft./level)
Targets one firearm
Duration instantaneous
Saving Throw Reflex partial (see below)
Spell Resistance yes (object)
DESCRIPTION
You can make a nearby loaded firearm (excluding siege weapons) misfire. This does not add the broken condition to the affected firearm, however the misfire is treated as an explosion. A successful reflex save halves the damage (the save must be against this spell's DC and not the standard misfire save).
Thoughts?