The MEC Sizemaster Single-Stage Reloader (MEC part no. 812012) brings simplicity and real efficiency to 12 gauge shotshell reloading. Its Power Ring collet resizer returns every hull base to factory specification, whether you’re running brass or steel heads, high base or low base, so the press doesn’t care what you feed it. E-Z Prime auto primer feed dispenses primers automatically, standard on this 12 gauge configuration, and the press is adjustable to load shells up to 3 inches. A realistic single-operator pace runs 4 to 6 boxes per hour, and the press ships with 3 bushings and 1 charge bar so you can start metering common 12 gauge loads right away.

Key Specifications

• Chambered for 12 gauge.
• Built as a single-stage shotshell reloading press.
• Uses a Power Ring collet resizer that returns every base to factory specification.
• Resizing station handles brass or steel heads, high or low base.
• Rated to load 4 to 6 boxes per hour.
• Features E-Z Prime auto primer feed that dispenses primers automatically.
• Adjustable to load up to 3-inch shells.
• Ships with 3 bushings and 1 charge bar.
• Uses a multi-size thread pattern compatible with standard MEC accessories.
• Measures 23.4 inches overall.

Frequently Asked Questions

Does it prime automatically? Yes, E-Z Prime auto primer feed dispenses primers automatically, standard on this 12 gauge configuration.

Can it handle steel-head hulls? Yes, the Power Ring resizer handles brass or steel heads, high or low base.

How fast can I load? A realistic single-operator pace is 4 to 6 boxes per hour.

Buy the MEC Sizemaster Single-Stage Shotshell Reloader, 12 Gauge

12 gauge shooters loading serious volume need a press that doesn’t care whether a hull is brass or steel, high base or low. Order from our Mec Reloading lineup in our reloading presses and kits selection, and our Lubbock, Texas team can help you round out your bushings and charge bars.