Dolomite
Silver $$ Contributor
I just did a simple step, took out the expander ball from my die and use a SAC bushing helped reduce all run out for me. I use a Co-Ax, whidden or harrels die, sinclair mandrel die, and 21st century mandrel, nothing special, adjust die to bump shoulder and bam.... I barely get .001 runout for my 223, 308 and 6br. Other bushings besides SAC gave me more run out anywhere from .001 - .005 for whatever reason.
