I've used naptha lighter fluid or isopropyl alcohol, aka rubbing alcohol to degrease anything that needs degreasing. Generic store brand rubbing alcohol is pretty cheap and a little goes a long way.

The only Lee dies I've used are their collet neck sizing dies and those can use some polishing and lubrication where the collet fingers rub against the shoulder that squeezes them. Sometimes - not often but sometimes - the mandrel that the case neck is squeezed against can be a bit too large and some folks will polish that down a thousandth.

If you're not using the Lee collet die then disregard that last paragraph, but if so, here's a good video of how to polish one.


Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!