This is a bit of a long winded post, but if you read it, there is some good info on tuning and matching a system up properly.
It does make a difference in some situations if you have a tip protector on a bow or not. It is a slight difference, but there is a difference never the less.
A lot of people say you can not bareshaft tune a broadhead arrow because the broadhead will windplane, but the truth is it can be done. I have done it and I know of a few others that have done it as well; however, for that to happen, everything has to be perfect. I recall one set up that I had that was super forgiving in bareshafting and I was able to bareshaft several different broadheads (zephyr, 125-160 gr snuffers, and Abowyer broadheads) and without broadheads I was able to bareshaft 2117, 2216, & 2219, but the 2216 was the only arrow that shot the broadheads perfect. What that meant to me, it was my go to shaft for a fletched up arrow.
Anyway, upon putting a tip protector on that bow, I could see a slight amount of nock high coming out of the bow within the early portion of the arrow's flight. Of course it wasn't much and it would straighten out without much flopping, but I noticed it because I was used to seeing that clean spin of the fletching and that's all...and I could see that the flight wasn't the same. I decided to shoot a bareshaft and I had nock high even with field points. I took the tip protector off and haven't used one since.
What you can do is get a jar and mix up some of the massey epoxy finish up in it, and then dip your lower tip in the jar in it, hold it there for a second, and then when you pull it out just shake off the drip if there is a drip. Let it dry and do it again if you want some 4+ hours or so later. Once dry solid (6-8 hours or so), you can steel wool it slightly and then wax it AFTER you are done (do not wax between coats) and that will leave a thin coating of epoxy over the lower limb tip that isn't anything more than a thicker coating of finish, meaning it would weigh very little. Of course, to do this, it may create an issue with your current finish depending upon what finish is on the bow.
BTW, a fletched arrow will generally shoot slightly stiffer than an unfletched arrow. The more tuned your equipment is, the more forgiving the system will be.