MEC 600 Jr. Mark 5 Single Stage Shotshell Press - Gauge: 10 Gauge - The Power Ring collet resizer returns bases to factory specification regardless of whether they're brass or steel heads high or low base. - Factory set for 2-3/4 adjustable for 3 shells. Additional die sets (to change gauges) are available. - E-Z Prime primer feeder included on 1012 16 20 28 gauge models. - 2 ounce Charge Bar (lead shot only) included