My method of removing lube to PC some bullets,
Hot water is your friend!
I did some commercial cast a couple months ago.
All done outside on the gas cooker, used an old 10-12 quart pot and an old metal colander.
Place bullets in colander, colander in the pot, cover with water and heat slowly till it comes to a low boil, skim the lube off the surface as it comes up, I let mine boil about 10 minutes.
Remove and dump on an old towel to dry, then just to be safe rinse in acetone.
Then PC as usual.
Ronnie