I like using a chronograph because helps me work on getting a more consistent anchor and release buy the arrow speeds. I know speed doesn't kill as much as consistency and accuracy does.

Just for grins I shoot my EX through 2 different chrono's [pro chrono and a F1].Bow is a 60" 56@28 and I draw 28.5, arrow was 576gr axis.
3 shots through each chrono all were within 181-183fps and this is with a loaded string [silencers/tie-on nocks] hunt ready and with fingers. Brace height is 7.00 on the nose.
Ur finding at 27 should be correct as per your first post.