The bottom line verification, for me personally, is in BH tuning.
Typically, I will bare shaft tune (feathers trimmed to quill) first. When I bare shaft tune to my point-on which is 30 yards, my large Big Three's are spot- on at ~25 yards. Note: Found this method quite effective even though I utilize a nose-tip anchor. Also, other bare shaft set-ups tuned to 30 yards, including this particular one, consistently produce bullet holes thru paper w/o any modifications to the set-up..
There are several valuable advantages in carrying one in my quiver. One is for simple set-up verification. Also, frequently conduct bare shaft only practice sessions to highlight form errors. Have also shot bare shafts, with much success, during extremely wet 3D events.
Note: Keep in mind that tune ability is limited primarily to the preciseness and consistency of ones shot execution.