03-05-2020, 12:20 AM
Since you mentioned not using a bushing type die, checking that your expander is smooth and not ridged with a bunch of machining marks is where I'd start.
Video that explains how:
https://www.youtube.com/watch?v=aaHrO4Rh7ns
Video that explains how:
https://www.youtube.com/watch?v=aaHrO4Rh7ns

