Do NOT -- repeat NOT -- set the sizing die to match any chamber GO/NOGO headspace gauge. Do NOT.
If that's the way your chamber is set, why would you not? At least as a starting point?
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.