What you describe is a good approach. Leave the extractor in. One way is to close the bolt and screw the barrel in until it lightly touches. back it off a turn or so. Insert the go gauge and then adjust the barrel untill the gauge stops it. Back off a small amount. Lightly tighten the nut making sure the action barrel relationship does not change or index. Try both gauges, I try to get the go gauge loose and the no go where the bolt will move but then stops before it gets started on the lugs. In no way should the bolt close on the no go.
If you use a breakover bar on your wrench i like to get it tight then with pressure on the breakover bar, wack the nut wrench with a soft mallet. I have it down where it is consistant. You could probably go 40- 50 f/lb's
You got this.
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