In the real world, I think you have to bear in mind that there are huge numbers of Enfields that are soldiering on perfectly well with mismatched bolts that have clearly never been "fitted", and that there is correspondingly no body of evidence to show that there are any ill-effects from this practice.

Its possible that the original design even allows for some asymmetry of lug fit; perhaps the receiver just bends one way or t'other to take up the slack!

Back in the day, the army didn't seem too fanatical about keeping bolts matched to rifle with the original issues of Lee Metfords and LE1s. Often they were stored and issued separately, and many/most rifles have come through to today with mismatched bolts.