There's a million different lube recipes. Most use beeswax, and a blend of some other stuff.
I use half Crisco, half beeswax, and pan lube. A bullet with a deeper lube groove than most bullets designed for smokeless lube is best. Google "Big Lube Bullets".
You can use your existing bullets, but you'll need to melt out the lube. Spread the bullets out on some doubled up paper towels on a cookie sheet and put them in the oven set to 150-200 degrees. Within 10-15 minutes all of the lube will be melted out and absorbed by the paper towels. Then you can lube with whatever you want, using whatever method you want.
Hang out in the black powder section for lube ideas. Commercially, SPG or "Perl Lube" are most often recommended. There are even some commercial casters who will lube their bullets with black powder lube (usually SPG) if you ask them to.
If you used Hodgdon 777, it can be used with the smokeless lube on your bullets. I've never tried 777 though.