For many reloaders, annealing is a “dark science” that defies easy explanation. When done right, annealing extends brass life and makes neck tension more consistent, something very important for accuracy. ... And we know annealing can make your brass shoot better and last longer.

Is brass annealing worth it?

It is worth it if you are looking to maintain accuracy over the life of your brass. Without annealing you will start to see inconsistency in accuracy after "X" amount of reloads. One thing i do know is that if its not done properly then you will either see no benefit to it or have an issues with your cases.

Should you anneal brass every time?

Annealing should always be done before resizing. This eliminates spring back, and ensures repeatable and accurate shoulder bumping and neck sizing. Annealing should be done every reload.