“The talent of hitting things at longer distances. You get a +2 bonus, for each level of this Perk, to Perception for the purposes of determining range modifiers. It's easier than ever to kill at long range!”— in-game description, Fallout
You have a talent for hitting things at longer distances. When using firearms, your attack ranges are all increased by a factor of 1. E.g., if point blank for your weapon is 4 hexes, it becomes 8 hexes, close moves from 8 to 12, and so on.