'An Attack Delay limits rate of fire by requiring a specified amount of time to pass before the next shot can be fired. If that second part is unclear let me use some more definitions. However, if a weapon is converted to automatic or bolt-action fire, the time between shots becomes derived purely from its speed and/or firing animation duration.' This is internally derived from the weapons attack delay rating divided by its speed rating. 'The in-game given number gives the maximum cyclic number of shots/attacks per 10 seconds, without considering reloading. The Fallout wikia provides a helpful explanation of Rate of Fire on this Weapons page.
