According to the Czech legislation, two authorised methods may be applied for grading pig carcasses with the classification apparatus UFOM 300. These methods were used to evaluate the set of pig carcasses (n=844). Measurements on the carcass were performed both before and after evisceration. The differences between obtained characteristics were not significant when the entire set of carcasses was analysed. Similar results were also observed in the most frequent carcass weight category 80 – 100 kg and in quality grade E. The greatest differences in lean meat content were found in the weight category 100 – 120 kg and in quality grade R characterised by the lean meat content ranging from 45 to 49.9 %.