If your bullets drop out of the cast at a good diameter and you're using them for light plinking loads just tumble them with some Alox.
If you don't want to spend a bunch on a lubrisizer, don't want to tumble lube, and don't want the mess of pan lubing there is another way.
This only works for soft lubes like 50/50 beeswax. I simply put a little lube on my finger and smear it into the lube grooves, then run the bullet through a Lee push-through sizer. It's a little slow, but it works great! It's also a good way to seat gas checks and lube all in one step.