I bought a set of four new Lee dies for 6.5cm. The machining looks ok but they didn't clean them off of the mill - covered in oil mixed with black crap and tiny metal chips.
What's the best way to clean them? Soap, water and ultrasonic cleaner and then dry and oil them?
I'm pretty sure the chlorinated stuff went away 20 years ago. Unless someone has a stash?
I think all the new dies are sprayed with something like cosmolene as a preservative. Any solvent type cleaner will work.
I keep a jug of kerosene around for stuff like that.
After reloading more than 70 cartridges I clean my dies with brake cleaner, work quite well. i lightly oil them with rem oil after they are cleaned no lube is required for neck sizing with collet die, but is necessary for full length case sizing.
That said the one below is the one I use. I keep a couple of cans on hand but they can be purchased at any Autozone. It also will not hurt polymers (such as in handguns etc).
The original brake parts cleaner. Formulated to quickly & effectively remove grease, brake dust, brake fluids, oils, & other contaminants from brake parts, lining, pads.