The MEC Mayville Engineering INC 844712: 600 Jr. Mark V single stage reloader is trusted to offer superior performance for both rookie and experienced gun enthusiasts. Boasting a design that ensures easy operation with minimal effort, it has stood the test of time in delivering excellent results.With its efficient cam-action crimp die, each shell is carefully restored to its original condition. This feature, along with the ease of positioning wads, makes operation quick and hassle-free. Capable of loading 8 to 10 boxes per hour, the MEC 600 Jr. Mark V offers remarkable efficiency.Additionally, it features an adjustable mechanism that can accommodate 3\" shells. Kindly note that this model is specifically designed for 12 gauge.