“Tight chambers” is a term that is misused. You may have a chamber that has tight headspace . You may have a chamber that has been cut with a reamer that has tight radial diameter or a combination of both .
Factory rifles gerenally won’t have a tight chamber radially . Often it is a combo of a chamber having minimum headspace and ammo that is on the maximum headspace that cause stiff bolt CLOSE. Stiff bolt lift and ejector marks are indicators of a hot load caused by ammo , short throat or a tight barrel or a combination of these factors
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