'So if you've got alot of runout, what sort of stuff might one try to decrease runout?'
Trim your cases to the same length, load them with a full charge and shoot them. That will insure that your spent cases reflect your chamber. Then, for concentrict loading:
First, check your fired case necks for runout; they should be pretty straight. If not, you are whipped by a bad chamber before you start.
Second, size the case/necks and check again. If you have much run out in the sized cases it will insure that the bullets cannot be seated straight until you get it corrected. A conventonal button type expander is perhaps the most frequent producer of bent necks, lubing inside the necks helps.
I like Lee collet neck dies made without a conventional expander for best concentricity. I use Lyman "M" expander dies when I full length size; it expands by pushing in, not dragging out, of the necks and that makes for somewhat better necks.
Third, use a really good seater. If you get good concentricity from a conventional seating die, that's great but it's uncommon. If you get much bullet runout use a seater die from Forster or Redding which have a sliding sleeve which envelops the full case (not just the neck as the Hornady and a few other so-called "competion" dies do) for true straight-line seating.
Forth, if you crimp at all, use a Lee Factory Crimper, not the crimping ring built into most seating dies. The Lee dies are not overly length critical and won't tend to drive the neck down into the shoulder like the others.
Other that these few suggestions, I have no idea.