Did some googling last night and my impression is that the annealing temperature can vary widely depending on alloy, so my experience with annealing copper electrical wire, may not be very applicable to annealing C110.
One thing that seems to be a big issue is oxygen absorption. (The main reason I was suggesting a 'sealed' up charcoal grill, to provide a low oxygen environment.)
Anyway, I'll start a new thread on this subject.
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