If the bow is tuned and arrows spined correctly, you never need to move the sight from field points to broadheads.
When an arrow is released from a bow, out of tune or a shaft not spined correctly, the shaft will compress, thus moving the point either left or right of center. So if it compresses two inches to the right of center, it will recover to center then compesate a tad less then two inches to the left, this will repeat itself smaller each time until it has regained center with field points. Add a broadhead to the same setup and its initional reaction will be ten fold. Not allowing it to compensate as much. Meaning your point of impact will now be to the right, and sights will need to follow impact. To bring back to center
Broadheads are like wings and grab air, if they are spined and tuned, and the paper shots both bare and fleched show perfect holes. They will shoot the same as your field points.

I also like to shoot bare shafts close, if my shafts are 30". I will stand 40" back from paper. The arrows first action is what tells the story. Standing any further back, you are likely to see it's reaction, and then your tuning toward the problem not the correction