You may wish to consider the following in order to shed light on your question.
Try bare shafting to 40 yards. If your point-on is beyond 40 yards, then substitute that value for this 40 yard bareshaft tuning example.
Take a small, yet highly visible target, mounted on a stiff enough wire to position the target approx. 16"s above the central medium you typically shoot in to.
Shoot your fletched shafts having your arrow point centered on the target above the medium until you have demonstrated some level of repeatability. Then shoot your bare shafts, again using the arrow tip point-on. Much can be determined when pursuing this level of tune.
You are not to be concerned with nock position, but only the relationship of the mark between the bare shaft and fletched shaft.
Note: would benefit many to start closer then work back. My approach is that Bare shaft tuning and shooting for a mark are two totally different elements. This is my personal approach and has yielded excellent BH flight.
Also note: Olympic Archers may bareshaft tune more than double the 40 yard distance prescribed here.