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Mayville Engineering
The MEC Super Sizer is a dedicated shotshell resizing die built for reloaders who demand precision and reliability. Whether you're a beginner setting up your first progressive loader or an experienced hand looking to upgrade your reloading bench, this steel-frame sizer handles the critical job of bringing fired cases back to factory specifications. The Super Sizer works across all common shotgun gauges and bores, making it a versatile choice for hunters and sport shooters who reload multiple loads.
At the heart of the Super Sizer is MEC's Power-Ring collet—a resizing system that applies even, consistent pressure using eight steel fingers that encircle the base of the fired hull. This design reshapes the base back to its original dimensions with minimal effort, which means less fatigue during long reloading sessions and more consistent results across your reloaded ammunition. The eight-finger approach distributes force evenly, reducing the risk of case deformation and ensuring your resized shells chamber reliably in even the most exacting shotguns.
Built from durable steel throughout, the Super Sizer is designed to integrate with MEC reloading equipment or to upgrade an existing conventional loader. All necessary hardware for installation and operation is included. The sizer accepts all standard shotshell lengths, giving you flexibility as you work with different loads and configurations. For reloaders serious about ammunition quality and consistency, this is the tool that does one job—resizing—and does it right.
| Gauge/Bore Options | 10, 12, 16, 20, 28 gauge, .410 bore |
| Frame Material | Steel |
| Resizing System | Power-Ring collet with eight steel fingers |
| Shotshell Length Compatibility | All standard lengths |
The Super Sizer is available for 10, 12, 16, 20, and 28 gauge, as well as .410 bore. You'll select the version that matches your reloading needs.
Eight steel fingers encircle the base of the fired hull and apply even pressure to reshape it back to its original dimensions. This design reduces fatigue during reloading and produces consistent results across your ammunition batches.
Yes. The Super Sizer is designed to integrate with MEC reloading equipment or to upgrade a conventional loader. All necessary hardware for installation is included.
The Super Sizer is designed to accept all standard lengths of shotshell, giving you flexibility across different loads and configurations.
Mayville Engineering
The MEC Super Sizer is a dedicated shotshell resizing die built for reloaders who demand precision and reliability. Whether you're a beginner setting up your first progressive loader or an experienced hand looking to upgrade your reloading bench, this steel-frame sizer handles the critical job of bringing fired cases back to factory specifications. The Super Sizer works across all common shotgun gauges and bores, making it a versatile choice for hunters and sport shooters who reload multiple loads.
At the heart of the Super Sizer is MEC's Power-Ring collet—a resizing system that applies even, consistent pressure using eight steel fingers that encircle the base of the fired hull. This design reshapes the base back to its original dimensions with minimal effort, which means less fatigue during long reloading sessions and more consistent results across your reloaded ammunition. The eight-finger approach distributes force evenly, reducing the risk of case deformation and ensuring your resized shells chamber reliably in even the most exacting shotguns.
Built from durable steel throughout, the Super Sizer is designed to integrate with MEC reloading equipment or to upgrade an existing conventional loader. All necessary hardware for installation and operation is included. The sizer accepts all standard shotshell lengths, giving you flexibility as you work with different loads and configurations. For reloaders serious about ammunition quality and consistency, this is the tool that does one job—resizing—and does it right.
| Gauge/Bore Options | 10, 12, 16, 20, 28 gauge, .410 bore |
| Frame Material | Steel |
| Resizing System | Power-Ring collet with eight steel fingers |
| Shotshell Length Compatibility | All standard lengths |
The Super Sizer is available for 10, 12, 16, 20, and 28 gauge, as well as .410 bore. You'll select the version that matches your reloading needs.
Eight steel fingers encircle the base of the fired hull and apply even pressure to reshape it back to its original dimensions. This design reduces fatigue during reloading and produces consistent results across your ammunition batches.
Yes. The Super Sizer is designed to integrate with MEC reloading equipment or to upgrade a conventional loader. All necessary hardware for installation is included.
The Super Sizer is designed to accept all standard lengths of shotshell, giving you flexibility across different loads and configurations.
