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This is for 12 Gauge. You would need additional Die Set for 20 or other Gauges. : The Sizemaster Shotshell Reloader offers simplicity without sacrificing convenience and efficiency. The "Power Ring" collet resizer returns bases to factory specification, regardless of whether they're brass or steel heads, high or low base. Adjustable to 3" shells. Additional die sets (to change gauges) are available. E-Z Prime primer feeder included on 10, 12, 16, 20, 28 gauge models.

This only fits the mec 600 junior mkV shotshell reloader It is not a sizemaster and does not use a "power ring" collet resizing bushing I It is for 12 ga only. to switch over a mec 600JR would take about a hour including adjustment after doing it once or twice you would just break down and buy multiple mec reloaders in the gauges you want to load I have Mecs in 12 20 28 and .410. If you watch craigslist and other local sites you can get a used mec 600 Jr for around the same price

Hi Raja, I'm sorry this is only for 20G. You can find them direct https://www.mecshootingsports.com/600-jr-mark-5-die-set

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