Incidentally, I believe reload bulletins have more of an effect than cooldown bulletins due to reload times are usually greater than cooldown for most weapons.
It's the difference of a few percentage points off a 3 second reload versus off a 1 second cooldown.
A small difference, but if you're min/maxing the spreadsheet it can be meaningful.
You also have to factor in that the grens and cons only reload after 5 shots, so the cooldown reduction happens 4x as often as the reload.