If your loads seem to drift after a few reloads — SD creeping up, the occasional split neck — the culprit is often work-hardened brass. Annealing brass resets that hardening so your neck tension stays consistent and your cases last longer. Here is why it works, how to do it, and the safety rule you must not break.
In this guide
- Why brass needs annealing
- How it helps accuracy
- Temperature and what not to do
- Annealing methods
- How often to anneal
- Do you actually need to anneal?
- Track firings in LoadNode
Why brass needs annealing
Brass work-hardens every time it is fired and resized — the metal gets stiffer and springier with each cycle. Left unchecked, the case necks grip the bullet with steadily changing force from one reload to the next, and eventually they get brittle enough to crack and split. Annealing softens the neck and shoulder back toward a consistent state, restoring uniform behavior and extending case life. The metallurgy is the same annealing used across metalworking.
How annealing helps accuracy
The payoff for precision is consistent neck tension. How tightly the neck holds the bullet affects how the bullet releases and how pressure builds, which feeds straight into velocity consistency. Brass that is annealed on a schedule releases bullets more uniformly, so your SD and ES stay low and stable instead of wandering as the brass hardens over its life.
Temperature and what not to do
Annealing is about getting the neck and shoulder to the right temperature for a brief moment — commonly cited around 700–800°F for a short dwell, not a bright glow. Too little does nothing; too much ruins the brass. Use temperature-indicating lacquer (Tempilaq) or a machine for repeatability. The unbreakable rule: never let heat reach the case head or body. The head must stay hard to safely contain pressure — a softened case head is dangerous. Keep the heat at the neck and shoulder, and keep it brief.
Annealing methods
- Flame (a torch with a case spinner, checked with Tempilaq): inexpensive and effective, but harder to make perfectly repeatable shot to shot.
- Salt bath: a molten-salt dip — effective but messy and less common today.
- Induction (e.g., AMP-style machines): heats by electromagnetic induction for highly repeatable, consistent results — the gold standard, at a price.
How often to anneal
For top-end consistency, many precision shooters anneal every firing; others do it every two or three. What matters most is doing it on a consistent schedule so every case in a batch has seen the same treatment — uniformity across the batch is the goal, not a magic interval.
Do you actually need to anneal?
Honestly, not everyone does. If you load plinking ammo and retire brass after a few firings, you can skip annealing and never notice. Where it earns its keep is precision and brass economy: if you are chasing single-digit SD across many reloads, or you have invested in premium brass you want to last, consistent annealing keeps neck tension — and therefore your velocity — stable over the life of the case. Match the effort to your goal: casual volume shooting, optional; serious precision, well worth it.
Track firings in LoadNode
Annealing only helps if it is consistent, which means knowing how many times each batch has been fired. LoadNode lets you record brass lots and prep in your recipes, so you can keep your annealing on schedule. Pair it with solid brass prep and watch your SD settle down.
Handloading is an adult activity. LoadNode is a logbook and analysis tool — it never provides load data. Always develop loads from current published data, start low, and work up safely.
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