I evaluate whether or not the necks even need cleaning before doing anything, just try wiping a few with some Hoppes non copper cleaner, see how they look, if it's not mostly coming off, I toss them all in the tumbler, which is usually only after probably 5-6 firngs min. With the kind of pressures & temps the neck sees, microscopic holes tend to get opened up real quick, can't say as I recall ever seeing one anyway, never had a split neck on any of my stuff either, even with 12 shots on non annealed brass.YMMV, but, suspecting you are overthinking it, we are all at the mercy of the makeup and processing of the new brass, some brands may actually be better than others in that respect, some cartridges seem more prone to neck defects than others. I've used mostly WW or Rem brass over the years, I have RWS, Peterson, Starline, Hornady, a few unknown relabelled ones like Browning, Sierra, Herter's. Only times I've had any issues, were with primer pocket expansion on Norma and Federal, and they were hot loads anyway, which usully wrecks most all makes. Had some issues with separation rings developing early, in the early days before I figured out how to size a case properly.