Using a Whidden 6 Dasher Hydroforming die and I am having some dramas with it. I'm using brand new Lapua 6 BR brass. I'm inserting a used primer (upside down) to prevent water contamination. Using demineralised water. After every 3 to 5 cases the plunger is severely marked on the stoke end. It looks like galling to me. The die is brand new, flushed clean with shellite after every use.
There is no way there is any contamination getting into the die but I am getting these bad galling marks. After 3-5 cases I have to use a drill bit as a rod to push the ram back out the top of the die and then chuck up the ram in drill press and use some 1200 sandpaper to smooth it out again. After forming 100 cases the tolerance between the ram and guide are so loose its not sealing properly and just making a watery mess around my reloading bench. I have changed to spare ram supplied and after another 100 cases its buggered now too.
Am I doing something wrong? Is this a design flaw? Its driving me mad. Hoping the brains trust here might have an answer.

There is no way there is any contamination getting into the die but I am getting these bad galling marks. After 3-5 cases I have to use a drill bit as a rod to push the ram back out the top of the die and then chuck up the ram in drill press and use some 1200 sandpaper to smooth it out again. After forming 100 cases the tolerance between the ram and guide are so loose its not sealing properly and just making a watery mess around my reloading bench. I have changed to spare ram supplied and after another 100 cases its buggered now too.
Am I doing something wrong? Is this a design flaw? Its driving me mad. Hoping the brains trust here might have an answer.



