Alchemical cartridge (dragon's breath)

An alchemical cartridge is a prepared bundle of black powder with a bullet or pellets, sometimes with more exotic material added, which is then wrapped in paper or cloth and sealed with beeswax, lard, or tallow. There are many types of alchemical cartridges, the simplest being the paper cartridge—a simple mix of black powder and either pellets or a bullet. Alchemical cartridges make loading a firearm easier, reducing the time to load a firearm by one step (a full-round action becomes a standard action, a standard action becomes a move action, and a move action becomes a free action), but they tend to be unstable. The misfire value of a weapon firing an alchemical cartridge increases as listed in each entry.

Dragon’s Breath Cartridge: This cartridge contains alchemical compounds that, when fired, produce a cone of fire instead of the normal attack of a one-handed or two-handed firearm with the scatter weapon quality. The nonmagical flame deals 2d6 points of fire damage to all targets within the cone of the scatter firearm (DC 15 Reflex save for half). These cartridges cannot be used in firearms that don’t have the scatter weapon quality. Because this ammunition forces a saving throw instead of making an attack roll, the misfire rules are slightly different. If you roll a 1 with either of the damage dice, the firearm misfires.