For damage done, yea. For nades its 300 points if at your feet (which is the player origin) down to a minimum of 75 points at 256 units. Outside 256 then no damage. So to the center linear damage starting at 75 on the outer circle up to 300. The closer you are the more damage. Again this is just base damage and doesnt account for obstructions. Actual damage is entirely calculated by the internal game engine taking into account the ground, walls, any trees, rocks, maybe cars. All that stuff. Also how much of the player can actually be 'seen' by the nade. %100? Maybe only above the waist?
For those with the jacket the actual range is the same at 256 units but the linear damage will be from 25 to 105 points. Which is %35. The lone exception being tubes with a lower percentage. It operates different from ballistic armor because that one stops ALL bullet damage not just a percentage.
I have talked about this, what, a minimum of 20 times now?