Before you have your receiver squared, do you know what needs to be done to bring it to a customs spec. Too bad that you already have the bolt before the machine work. If the receiver is machined properly your bolt timing will now be off and To machine it properly you start with reaming the raceways. Now your bolt is loose in the receiver. When you cock it the rear of the bolt will rise keeping the upper bolt lug from being in contact with the lug abutment.
Even a varmint rifle will not really be helped doing this, but do it if it makes you feel warm and fuzzy.
I would recommend barrel, trigger,bedding, and proper load workup.
Which is precisely why I talked to the smith before I ever ordered the bolt. He had me take measurements between the raceways, and measure the width of the original bolt. Then he told me what OD bolt to get so everything would be nice and tight once he does the machining work.
