The proper annealing of cartridge case necks — never the body or head — extends case life and increases accuracy. Here are some good ways to do it.
Cartridge Case Annealing - MassReloading
Annealing Brass For Reloaders: Firing Up Your Case's Lifespan
How Induction Annealing Works, Under The Microscope
Annealing Case Necks
Annealing brass for reloaders –
Experiment 1- Cold Work To Failure – Ballistic Recreations- Essentials For Salt Bath Annealing
Results Of Induction Annealing, Our Research
The Art and Science of Annealing within
The Role of Case Neck Tension in Reloading Consistency - FasterCapital
How I Anneal Brass Cartridge Cases for Reloading
Shooter's How-To's: Tips & Skills Page 3 - RifleShooter