In the constant quest to improve accuracy and consistency, precision reloaders go to great lengths to prepare their ammo as best they can. The goal is to produce ammo that is as near identical from case to case as humanly possible.
An area that is getting more attention is case neck annealing.
Annealing is simply the process of rapidly heating the case neck to approx 750F for a second or two. This causes the brass to soften and return to a state similar to factory fresh.
Why is this necessary? As brass is fired and sized, it is worked hardened changing its ductility. Over time, this can change the neck tension which can affect your load tuning. If left unchecked, the necks will eventually become brittle and split, ruining the entire case. With expensive or hard to form cases, extending case life is a very good thing.
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