BJung
Member
Do you prefer the Lee Collet Neck Sizing Die, Bushing Die, or Neck sizing die to assemble rounds with the least runout and best concentricity? I once owned a Lee Collet Neck Sizing die and the needle on my Sinclair gauge barely moved when testing for concentricity off the bullet ogive (I hope that's said correctly). But, I later tired resizing my case neck and then expanding it to .001" less than my bullet diameter with an RCBS expander and measuring the assembled round, the runout was worse. I used Imperial Die Wax too btw.