What do you mean by a "cutoff?" For Missouri interviews, there are three criteria that need to be met in order to get an interview (in other words, if you met these you automatically get an interview, though I believe last year there were only 80-something interviewees that attended). The three criteria are: 1) Have a cumulative GPA of 3.0, 2) 3 letters of elvatulation with one being from a vet, and 3) a 285 on the GRE with a 1.5 analytical score or a 15 MCAT.
Your academic score, on the other hand, is the total of your academic evaluation(the break-down is on the website and on the paper you will get), which is up to 40% of your entire evaluation (it will therefore be out of 40 points). Previously, the average accepted academic score is around a 25.91 for in-state, with 20.18 being the average for all Missouri applicants (I found this here:
http://www.cvm.missouri.edu/VetMedCatalog_2013_14.pdf).