There's roughly .005" between the go and no-go gauges. Set the barrel with the go gauge as you normally would and adjust your sizing die to barely bump the shoulder rather than full- length resizing. Brass fired in that chamber and neck sized only, or bumped minimally, will now headspace on the shoulder and the belt will have that .005" clearance. Since there is some spring back, I would (and do) neck size only.
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