MEC Super Sizer Die Set Converter To 12 Gauge
The MEC Super Sizer Die Set Converter To 12 Gauge lets you adapt your existing Super Sizer press to load 12-gauge ammunition without buying a whole new machine. If you're a shotshell reloader who's been running 20 gauge, 28 gauge, or another caliber, this converter set gives you a quick way to switch gears and start producing 12-gauge loads on the same press platform you know and trust.
MEC's Super Sizer system is built around interchangeable die sets, so converting between gauges is straightforward—just swap in the 12-gauge dies and you're ready to go. This approach makes sense if you reload multiple shotgun gauges or want to standardize your press investment across different hunting situations, from upland birds to waterfowl or clay shooting.
Whether you're loading for duck season, setting up a dedicated 12-gauge load, or consolidating your reloading setup, this converter die set keeps your workflow efficient and your investment flexible. It's a practical solution for shooters who've already committed to the Super Sizer platform and want to expand their capability.
Key Features
- Converts existing MEC Super Sizer press to 12-gauge loading
- Interchangeable die set design allows quick gauge conversion
- Works with your current Super Sizer press base
Specifications
| Product Type | Die Set Converter |
| Gauge | 12 Gauge |
| Compatible Equipment | MEC Super Sizer Press |
| Brand | Mayville Engineering Company (MEC) |
Frequently Asked Questions
What Super Sizer press does this die set work with?
This die set is designed to convert your existing MEC Super Sizer press to 12-gauge capability. It works as an interchangeable die set for the Super Sizer platform.
What gauges can the Super Sizer convert between?
MEC Super Sizer die set converters are available in 10, 12, 16, 20, 28 gauge, and .410 bore, allowing you to switch your press between these shotgun gauges.
Do I need to buy a new press to load 12 gauge if I have a different gauge Super Sizer?
No. Instead of purchasing a new press, you can simply swap in this 12-gauge die set converter to adapt your existing Super Sizer to load 12-gauge ammunition.

