I load on a 650 and that is exactly how I feel about double charges. If the powder measure hasn't been converted back to the old spring style and you cycle the handle consistently and positively from stop to stop it is going to work. I also empty my powder measure after each session because I want to see the powder flow into and out of the measure like water with no debris or clumps.
Reading that other thread makes me shake my head with all of the screwing around going on there. Checking a powder charge every ten rounds? Weighing ten charges every time he stopped? I am not familiar with the press he was using, but if you are going to load, load! Don't keep stopping and screwing around with the press! Concentrate on what you are doing, pay attention, and just keep loading at a steady cadence. I think that sometimes people try to be so damn safe that they become unsafe.
Oh yea, and running the cases through a bulge buster, (good) and then the finished rounds through a LFCD again? (why?)
Just my opinion.