This stat is most useful for comparing semi-automatic weapons such as rifles, where you can see the full damage caused by a single shot, regardless of how long it takes to load and fire the next one. For most guns, this is a single bullet, but for shotguns it is a single shell (containing several small pellets), for the Gatling laser it is a single beam, and for melee weapons it is a single hit. and shows the damage caused by a single click of the mouse/trigger.
