Most gun smiths use a chamber and bore plug when bluing. Since it is a type of oxidation or corrosion it is a fair assumption that it could be rougher and cause more friction but it would be difficult to test. Shooting the bore clean the difference might be so slight that the slight amount of throat erosion could off set this. This is a long way to say I don't know.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli