Which is Best for Long Range Competition Shooting? So, what do the acronyms M.O.A. and M.R.A.D. mean to shooters and what is the difference between the two? Well, the answer to that question is that M.O.A. indicates Minutes of Angle whereas, M.R.A.D. indicates Milli radians and both are angular units of measure. Because they are both used to measure the length of a section of a circle’s circumference, shooters use either Minutes of Angle or Milli radians for measuring the adjustment range of their rifle scopes. Although, there is no inherent advantage to choosing one over the other, some shooters...