i would spot check them. if you run into a few that are too long then i would measure the whole lot.
i shoot .45 colt and load it hot sometimes and i do check occasionally. honestly though, i have never found a need to trim yet.
cases for .45 are great in that they take very little prep, don't need to be lubed to be sized if you have a carbide die, and can be loaded many many times.
-Matt