I think you'll find that Loadmasters on Commercial jets do a different job to military types. I could be wrong (I was once you know), but I think the military role is a more "tie down" type of job, whereas the big jets are more palletised.
I once went for the Loadmaster job for the RAAF when AN handled them at MEL, but missed out. Very different to the loading for MD-!!'s & 747's!