I disagree w/ the comment that the rimmed cases are INHERANTLY more accurate than non-rimmed cases. That comes from some very old biases that frackly have not been born out or proved to be factual. There are plenty of top notch benchrest shooters thathave proved that the belted cases can be just as accurate as the smoothies. The same holds true of the short-fat being more accurate, that is a popular theory at the moment, and may be proved to be true,but not fact. There is one FACT, they aremore efficient in that they use less powder to achieve the same velocities.