Just got my Whidden .308 FL sizer bushing die today. For some reason it's leaving scratches on my Lapua Palma brass.
I cleaned the inside of the die with Boretech eliminator and tried polishing with #0000 steel wool. There is a mirror finish on the inside of the dies.
I'm using imperial sizing wax as lube. Any idea what is causing the scratches?

I cleaned the inside of the die with Boretech eliminator and tried polishing with #0000 steel wool. There is a mirror finish on the inside of the dies.
I'm using imperial sizing wax as lube. Any idea what is causing the scratches?