Steve — You make good points re relativity. While I fail to see that anything can be learned from faulty data, here are the original numbers you requested:

23.33 = field point, BOP

15.63 = including field point

23.73 = broadhead, BOP

21.21 = BH included

One more, perhaps minor potential for inconsistency: Using the FOC chart we often have to round up or down. I always round up but can’t say why.