Abex DC-9 can sizes are LD3 type cans that in addition to fitting in any of their ground transportation, fit perfectly in their feeder network, eg, Shorts SD-360 types.
This often negates the time consumed in a sort facility taken when splitting larger can types for re-distribution. Actual download time for a full DC-9 can be as little as 15 minutes.
Not saying it's the way to go just saying that it seems to work better than the looseloads we carry on the F-27 for FedEx which require multiple can re-weighs and mini-sorts, takes about an hour or more to fully down or upload the F-27.