The .264” loaded round gives me .0105” neck walls. An unturned loaded round is approximately .268”-.269” with .0125”-.013” neck walls. By turning .002” of brass off of the neck, I can guarantee that I get perfect necks, resulting in consistent neck tension. Without neck turning, you are at the mercy of the case manufacture’s quality control. I know that there a bunch of guys that say that they have done testing and some of the Lapua cases are good enough for accurate rounds. I am not sure that they are being honest with the rest of the shooting world. The rest of the shooting world is their competition! Take a new piece of Lapua 6mmBR brass and run it across a expander mandrel and neck turn just .0005” off of the neck and you will see the high and low spots down the neck. Then set it to take .002” off and it will be completely clean.
If I am going to spend the money to have a reamer built to my specs. it will have a tight neck.