Reality check - a 0.002" runout is
not terrible, in fact it is probably within the tolerences of most non-competition dies and chambers. I have lots of ammo with that degree of runout and it shoots fine. If the goal is zero runout, then be prepared to pay a lot for dies and chambers...and brass.
Even with perfect dies and chambers the brass you use may not allow zero runout. Cases with uneven case wall thickness* - very common in mass produced brass - will warp after firing and take on a "banana" shape. Very slight, but it will destroy the chances for zero runout. This is one reason for the use of costly premium brass for maximum accuracy. My last box of Lapua .308 cases exhibit almost perfect concentricity in case wall thickness. The last batch of Remington brass I checked on the other hand...
*
One way to check a case's wall thickness uniformity without destroying the case is to measure the case neck thickness at four points. Because the neck is drawn from the case body, any varience in wall thickness will show up in the neck too. If neck wall thickness varies by 0.004", so will the case body, and probably by much more..
