If you ever see me at the range, you will also see me reloading the same ten or fifteen cases over and over. It's quite common to see me load the same five cases over and over at the range. If I want to really see what's going on, I'll load the same case five times and index it. Cases never get cleaned, other than cleaning the primer pockets. I am kinda paranoid about clogged flash holes. I have seen a couple guys loading at the range that ran a bore cleaning brush into the case neck. I never have.
gary
yep the best benchrest group I ever shot I reloaded the same case between each shot. That was many years ago. Had a custom made set of hand dies matched to the shilen .222 benchrest gun. custom neck turner that came with the gun too. I didn't clean that brass either.
I would say you are only neck sizing and seating bullets with an arbor press.
Your brass never touches the ground.
I clean my brass to keep my full length sizing dies clean. Don't want to scratch my dies or brass.
The reason I went to a ultrasonic is I notices large flakes of burnt powder coming out of the inside of my cases in the tumbler. I figured that had to effect case volume. now they are clean inside and out.