It all depends on the station. If it's like, a cessna station, you may be the one meeting with the plane and getting the freight, or... if it's that small, everyone might be a ramp/crr and everyone just meets the plane, grabs their freight, and runs off to deliver it.
At our station, a ramp/crr is someone who typically has a pup route and then comes back and works the reload. Occasionally, that position has been slid to working ramp/heavyweights for most of the day with only being a crr when absolutely needed.