The Redding Match-Grade Model 3BR Powder Measure with Both Chambers is the top-performing powder measure in the industry, because it is completely ready to use straight out of the box. This powder measure delivers the same time-tested accuracy and unbeatable reliability of the Model 3 with the addition of several features bench-rest shooters will appreciate. The Redding Match-Grade Model 3BR Powder Measure can be used with two chambers