AMP Annealing website:
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.
We find that the best results are obtained with this sequence:
De-prime - (optional depending on your cleaning sequence)
Clean - tumble or ultrasonic etc. – again optional. Cleaning won’t affect annealing
Anneal
Lube - this is vital even with nitrided dies. (Imperial wax or spray such as Hornady One Shot) – note: Dry media graphite tends not to adhere well to annealed cases. We do not recommend its use.
Resize - after annealing, THE SIZING DIE MAY NEED TO BE ADJUSTED for both shoulder bump and neck OD to account for zero spring back. See FAQ 3, 5 and 6. De-priming can be done as part of the resizing process.
For more detail, see our Annealing under the microscope articles.
