You'll probably get .007 variance just in bullet production variance. You have to be careful with setback related pressures in many handgun cartridges but .007 is not an issue. The .003 you get on the first cycle is less than irrelevant.
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.