It depends... However the minimum I would do is neck size (even Lapua) then check the overall length for consistency before continuing with the reloading process.
With used brass, there are a lot more variables. Whether it was shot out of 1 gun, several different guns etc. In that case, usually deprime, wash/tumble, then full length resize or run it through a body sizing die, followed by the neck sizing die, then trim the length. Mixed headstamps for sure one will want to sort them by weight into groups. Military brass is also worth weighing because sometimes there are big variations that you would want to know about.
This last weekend I prepped a batch of 100 new Laupa Palma brass and when I did the neck sizing operation, the base of the neck was smaller than the mouth as I have always found is the case from any full length sizing operation I have seen. So they all were run though my Lee collet neck sizer, then primed.