So, here is a link of the process i use on my cases, however, i do not point the flame towards flammable things(wd40)… LOL
I also keep the flame smaller(lower) and do a slow speed turn with the drill and for a lot smaller time, never let the brass glow or go "red" hot, this process give me a bit more life, my Creedmoor has already 7 reloads without loose "precision".
I hope it helps.
Mac
https://www.youtube.com/watch?v=rTKsSpDaqZo
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