A handful of pellets, along with a dose of black powder, is commonly used as ammunition for one-handed and two-handed firearms with the scatter weapon quality, though rocks or other small bits of hard material can be used in the pellets’ place. Using anything other than pellets or alchemical cartridges when firing off a cone attack with a scatter weapon increases the weapon’s misfire range by 1 (though this increase can be removed by switching back to standard ammunition).
Pathfinder Roleplaying Game Ultimate Combat. © 2011, Paizo Publishing, LLC; Authors: Jason Bulmahn, Tim Hitchcock, Colin McComb, Rob McCreary, Jason Nelson, Stephen Radney-MacFarland, Sean K Reynolds, Owen K.C. Stephens, and Russ Taylor.