In actuality, the cooldown and the reload times have been switched in-between, so it reads 3-2.5 for the reload, and 3.5-2.5 for the cooldown. I used the average number for the base.
FYI reload replaces cooldown. Say you have a two round clip, a typical firing sequence goes like this:
Ready aim-> wind up -> fire -> wind down -> cool down -> fire aim -> wind up -> fire -> wind down -> reload.
Whenever the clip run "dry" so to speak, the reload time replaces the cool down time.