Would need to provide more information such as:
Actual draw length, string type,Arrow side plate and string details.
Even w/o the aforementioned information, the following would likely be the best information:
Where do your bareshafts mark relative to the fletched shafts and at what distance from the target?
or even better
Where do your BH tipped fletched shafts mark relative to your fletched shafts and at what distance from the target?
Keep in mind to start close such as at 5 yards and work your way back. Hopefully, you will be able to provide some data at a distance of 15 yards or possibly beyond. Also, take enough shots to develop confidence in the data.
There are many w/i the TG family far more capable to get you on track.