I am using the Lyman 3-die set to reload the 9mm…
The expander die has a tip that screws onto the stem so it can be changed to expand in different diameters depending on bullet/boolit—this is what I assume…
Regardless, the tip continually works loose and this puts a bell on the case mouth much more than need be…
I have wrapped a rubber glove around the tip and tightened it with a pair of pliers and it still works loose…
Any suggests on how to tighten it so it doesn’t work loose without actually clamping on to the expanding insert and deforming/scratching it…
Thanks…BCB