Hey, Arrows by Kelly does not even recommend it. Its funny though how their charts are pretty much right on though (I usually check after breshaft tuning).

What I do maybe a little different. I first tune only with bareshafts. What I want if straight flight, accuracy,and straight impact (most people allow a nock right impact (right handed shooter)). After I juggle to get what I want (that could be a whole nother topic), I then shoot some fletched arrows to make sure they are flying correctly. I don't believe the fletched arrows were ever off though after shooting bareshafts first (you could have clearance problems that you may have to adjust though).

I always try to shoot a few unfletched arrows every week.