With the proper sizer, proper technique, and proper setup, brass will last a long, long, time. Work hardening is what kills brass.
If you are barely sizing the body, (.001 or less), barely bumping the shoulder,( .001 or less), and have .0005 to .0075 neck clearance with a loaded round, it will work.
We do this in Benchrest and shoot "hot" loads, but the fine Lapua brass, using these methods, lasts a long time. When you go through a lot of trouble to prep brass, this is a good thing.
It is not for the new reloader. You cannot just set up your custom cut sizer once and go either. The new soft brass will slowly get harder and springier. If you don't keep up with the measurements and how much you are
bumping the shoulder, and adjust accordingly, it will go wrong. You have to adjust as you go until the brass "settles" in. If you bump it too much you will overstress your brass. If you bump to little, it will get to be to hard to chamber, and you will never get it back right once it is "settled in" at the wrong length. We are talking less than .001 error here.
The good news is you don't have to cut it that fine to get extended brass life, it just won't be as good as if you did. It can still lenghten brass life enough to be worthwhile, along with some accuracy enhancment by getting the bullet lined up with the bore a little better.