Description
The MEC Super Sizer Die Set converter adapts an existing Super Sizer head to 12 gauge for shotgun reloading and case preparation. Made by Mayville Engineering Co./Mec, this die set expands the versatility of a Super Sizer for shops and careful reloaders. The converter is offered alongside other gauge options for users who need to change between sizes. It is intended for reloading and case sizing operations where multiple gauges are required.
Key Specifications
- The manufacturer is Mayville Engineering Co./Mec.
- The product is listed as the MEC Super Sizer Die Set Converter to 12 Gauge.
- The listed function is converts an existing Super Sizer to 12 gauge.
- Available gauges are 10, 12, 16, 20, 28 Gauge and .410 bore.
- The product category is Case Preparation.
- The weight is listed as 0.4688 (units not specified in source data).
- The shipping weight is listed as 0.4688 (units not specified in source data).
This converter provides a practical, shop-focused solution for reloaders who need to adapt a Super Sizer to 12 gauge, reducing the need for multiple full head assemblies. Its straightforward compatibility and availability in multiple gauges make it a useful addition to a reloading bench focused on efficiency and repeatability.





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