Novice and seasoned gunners will appreciate the time tested excellence the 600 Jr. Mark V single stage reloader has provided over the years with quick, simple operation and minimum effort. The cam-action crimp die ensures each shell is returned to its original condition, and positioning wads is quick and easy. The MEC 600 Jr. Mark V can load 8 to 10 boxes per hour, and is adjustable to 3" shells. This model is for 20 Gauge.