For my 6XC precision target rounds I use a Redding FL type "S" bushing die without the expander ball and then run the case into the Sinclair Generation II expander. Works like a charm
http://www.sinclairintl.com/reloadi...ir-generation-ii-expander-dies-prod38807.aspx
http://www.sinclairintl.com/reloadi...ir-generation-ii-expander-dies-prod38807.aspx