A friend of mine had been complaining that he was getting a lot of run out on his bullet seating a few weeks back. When I ran into him last week he told me he had found a cure for the issue. Turned out the spring that holds the shellholder in to the ram on his RC had been tilting the shell holder a bit. Removing it and cleaning the groove where the shellholder fit almost eliminated the runout entirely. I just tried in and while on my bolt gun cases I always get good numbers, I just checked 25 loaded .308 rounds and had runouts of .002 max on 5 rounds, .001 on 8 rounds, and less than .001 on the remaining 12. Bit of a pain because you really have to take your time inserting and removing cases but if you have a runout problem it is worth a try. It costs nothing and you can always put the spring back if it does not work for you