My thoughts exactly, There were other bullets such as a 230 FMJ and it started at 5 grains. We all know lead is easier to push than a jacketed bullet so I knew the load was safe. But it was unusual to stop at the one load.I don't know if its true or not, but I have often heard that Lee does not test data, they just print data from other sources (and apparently) don't do a good job stating where they got the data.
One thing I do know, is that when loading data shows you only one load, the same load for both min and max, its...unusual...
But it was lights out . Done no more testing lee got that load right.