I've been around these Hajj flights and to be honest the loading and weights were all over the place. I've seen DC-10s/MD-11s (World Airways) with zamzam water just chucked into the holds (no pallets of containers), bags on pallets without nets. (Saudia) just a tarpaulin to keep things in place. Headcounts were also innaccurate, not surprising when getting the pax to board was like herding cats.
Anilv