When evaluating student learning, educators often employ scoring rubrics, for which quality can be determined through evaluating validity and reliability. This article discusses the norming process utilized in a graduate organizational leadership program for a capstone scoring rubric. Concepts of validity and reliability are discussed, as is the development of a scoring rubric. Various statistical measures of inter-rater reliability are presented and effectiveness of those measures are discussed. Our findings indicated that inter-rater reliability can be achieved in graduate scoring rubrics, though the strength of reliability varies substantially based on the selected statistical measure. Recommendations for determining validity and measuring inter-rater reliability among multiple raters and rater pairs in assessment practices, among other considerations in rubric development, are provided.