A less expensive alternative is molten salt bath annealing. The total cost of everything, if you shop the usual suppliers, is less than $100. The Lyman digital lead pot thermometer and Lee lead pot I bought from Natchez. The stainless steel fixture, bent thermo couple, and annealing salts I bought from the Canadian guy.
With any torch method, you can only control heating time with no idea of temperature.
With the molten salt method, you control both temp and time with UNIFORM HEATING on all sides of the neck.
I made up new cases last yr for my 30BR HV gun. I annealed them after expanding, trimming, & turning. This yr I annealed these cases a second time & made up a second batch for my Hunter class gun. I’m satisfied this method works.
Here’s a YouTube video of the method.
https://youtu.be/vwdTaDLz56Q
I hate to be the one to dig up an old thread, but the AMP is $1400 now plus all the accessories. was wondering if others here have tried this salt bath method ???? for literally 1/10th the money is it a viable alternative ???? seems like it would be more consistent than any of the torch methods.