My general understanding is that with lubrication in the barrel (wet), that pressures will increase . I do lube my barrel, to prevent rust, but before I shoot I take it out with a dry patch. I have found, when shooting at longer ranges, that the first shot will be off more, from a cold barrel with lube, than one without it. Now if you are shooting at 100m or so, I figure that it would be hard to tell.
Just my opinion. I have zero to back it up other than my experience with shooting targets at longer ranges, and trying it out. A chrono would be a good idea though..