SmallCaliberCentral

How important do you guys feel turning your necks is or trueing the outside of the necks to put it another way?

Depends on how much the thickness of the brass varies on the neck and how straight/tight the neck in the chamber is.

I prefer to turn mine. I would prefer to NOT turn necks, but, just a light cut will help.

I think it's important even for a factory chamber. But you don't wan't to cut them any more than you need. As a factory chamber is a little over size to start with. I clean up the neck with the first cutting. Then load them up and shoot it, then make my last cut on the neck so i get the same thickness all around the neck.
this gives me nice even tension on my bullet and helps keep it straight when release from the case. I hope this helps you to under stand it alittle better any ways. Lee