The Redding PR-50Precision Rifleman?s Powder Measure represents Redding's latest in the series of limited range "Competition" powder measures optimized with the precision rifleman in mind. The engineering target range was approx. 50-60 grains with the ideal use range extending from approx. 35 to 75 grains. This powder measure uses all of the engineering features and knowledge gained from our other Competition powder measures.