What is special about the salt?
It's a specific mix with a lower melting point and I think it also has no harmful fumes as long as you keep it under a certain temp (1050 F I think but dont quote me).
What is special about the salt?
I always knew military rounds were annealed because you can see the discoloration ( they don't buff it out after loading) Any reason one couldn't just get a pan of water, submerge the cases up to the shoulder and hit them with a blowtorch?
Also, I assume this is only a benefit with bottleneck cartridges?