When I set my dies up, I do it for the lead I intend to use, and tend to stick with that lead manufacturer and grain, for a while. After I am satisfied with the setup, by measuring, checking the seating etc, I lock the dies down and they are set.
Occasionally I will check the OAL, but not very often. If I switch types of lead or go from jacketed to hollow point, whatever then I will measure, but I might run 1000 or more rounds on a setup without checking the OAL.
This is with pistols and mostly with target loads, not rifles, those will be checked more often as I will be building my first rifle rounds next week probably.