For quite a few years now I have swabbed the bore with a dry patch to remove any left over oil and then pop one primer. I hunt with it this way until I shoot. I hunt out West in the dry air and in the humid South as well as the dew covered Appalachians. FOR ME, it has not been a problem but I certainly wouldn't suggest anyone take my advice without experimenting first.

The other side of this is that I've owned more MLs than I care to admit and the majority of guns that come through my hands do not have a different POI from a "clean" bore (as described above) vs. a dirty bore. There is one manufacturer that seems to more prone to having this issue than all the others though.

I hope this helps.