Yup, I've tried that method in regular seating dies and you can get good results.  But my consistency using that method was never as good as I wanted it.  Now that I've got case runout down to below .002", the runout of my loaded rounds rarely exceed .004".  When they do I just set them aside for practice.  Something to remember.  The newer the brass, the less all this seems to matter.  But I'm now on my second loading.  As time goes on and I use these 500 cases over and over again, I think (I hope) these steps I take will be increasingly worthwhile.  But, only time will tell.  In any case, I've had a ton of fun "solving" this problem.