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Annealing
I have an AMP. I bought it when living in a townhome and not wanting to use a torch setup.
If your paranoid about consistency the AMP is really nice. I have used a torch setup before and it worked fine.
I would save money and get a torch setup if you just want to extend brass life. If you are the guy that shoots every test load with the LabRadar going and a Kestrel logging atmospherics, just get the AMP.
Edit: I only really anneal precision oriented loads. I don?t bother with bulk 223/300blk loads.