My 9mm (1000's) read about .748-.749 'after' resizing. I shoot a CZ with a fairly tight chamber and recover my brass. Some have been fired "many" times.
The Lee manual says a new case is .754. Maybe my dig caliper is off too.
I've reloaded and shot many 1000's of these with no problems, but I load at the lower end of the charts for comp.
If I was going to load very hot rounds, I might look deeper into the question .