The Art and Science of Reloading...
Pride comes before a fall.
I prefer to shoot and NOT worry about if my brass is shiner than someone else's.
Many benchrest shooter's, before today's world of OCD, never even cleaned their cases--just hand-wiped.
They kept each set of cases together, with a notch in the head so each case was always oriented the same in the chamber.
It is OCD or ego/pride to do something that has no effect.
You vacuum your car to slow down and prevent wear and tear. Polishing your brass is NOT the same thing.
I can heartily "approve" of people doing things just because they like to, but I do not want these non-essential activities to be discussed to newbees as being IMPORTANT.
If someone wants to spend $300+ for ultrasonic cleaners and then spend time drying their cases, that is their business--but it doesn't mean that one should imply that it is required or will produce rounds any more accurate than those produced by wiping down the case exterior--which is all that most manuals ever say you need to do.
There are simply too many procedures and toys all aimed at "consistency" with no proof that any of the activities improves anything.
I have never read any papers on any benefit to primer pocket uniforming or flash hole deburring, yet how many have simply done because it "couldn't hurt" and how many actually did any shooting to see if it helped?
The magazines and the industry love to sell new toys, but in any reloading article, except Handloader, have you ever seen them do any testing to prove that their way is of any real benefit?
Then, is there any 'danger' of deburring too much and weakening the case head around the flash hole? Is there any 'danger' that you will uniform a primer pocket and have loose primers?
How many extra steps and processes have you adopted without ever verifying that they are worthwhile?
Thus, all a newbee should be worried about is what is required to load good, accurate ammunition and not what the toy-of-the-day is.
I deprime all my cases while inspecting and sorting when I get back from the range.
I have arthritis in my wrists and wiping each case is time-consuming and is very painful.
I, thus, tumble my deprimed cases in 20:40 corn for 30 minutes.
The exterior is clean and any white residue in the primer pockets is gone.
There has never been any media in the flash hole or the primer pocket.
However, I always tell a newbee that all they need to do is wipe off the case exterior. Then I mention tumbling as being a bit faster. As part of tumbling, I tell them that the media will break down and form fine dust, and that walnut does this much more than corn. This dust needs to be removed as it will pack into the case and decrease the effective case volume. For this, you should put some pieces of paper towel, toilet paper, or used drier fabric-softener sheets and separate media outside and try to get the dust to blow away.
Likewise, after reloading for over 40 years, I can state to my own findings that what little lube remains on case after all the handling during reloading is of importance UNLESS you are loading over 60ksi.
I also found that both myself and those I helped load back in the early '70s were better able to see the powder charge height after dropping the charge and before seating a bullet in each individual case than looking at 50 or more charged rounds all in blocks. People too easily see what they want/expect to see. If you inspect each case as you are placing a bullet on the case, you can not as easily miss one. Also, as you are going directly from the powder measure to the seating die, you can not double charge. You also will not drop and spill powder if something bumps the tray.
The key is that your way and my way may not be the same, but as long as both are safe, they are acceptable.
