Re: preping brass
I clean primer pockets every time.
Trimming is done every other time usually, keeping the cases shorter than the chambers OAL by .003" - .005" at minimum, the initial trimming is usually back by .007" - .008" though.
When I'm FL or NK sizing, I always trim "after" I size the cases, never before. The case will grow if you FL size them, then they aren't a consistant length anymore if you trimmed "first."
Flash holes get deburred initally and I never mess with them again...
I never have used lube with the Redding TNitride coated bushings, never have used any other though. I use a slight amount of lube on the neck with the other standard NK dies, even though I doubt it's needed.
If I have to use an expander ball, which I avoid, it's a carbide one of Reddings. Depending on how much it's opening the neck up, it may or may not get lubed too. Just ironing out dented necks on new cases or opening up a thou or two it works fine enough with no lube.
As soon as the necks start to get sooted up, or after 4-5 loadings, which ever comes first, they get annealed too.