My friend and I both had the same problem on the Lee collet dies we bought recently - the expander was too large. Measure the entire length of the expander - ours were larger at spots, not the entire length. We have been Lee users for years - their QC has really gone downhill the last couple years. Our .22-250 dies were at .225. They sent us a new expanding pin after we contacted them, but it is a pain to go through this.
been there turned the expander down to where i wanted it but that finished me with lee collet dies. won't ever buy one again
