Description
Finding factory 16 gauge shells on the shelf can feel like a scavenger hunt, which is exactly why the MEC Sizemaster in 16 gauge is such a welcome sight. This is MEC's workhorse single-stage press, and the 16 bore version lets you feed that classic sweet-sixteen without relying on whatever the local shops happen to stock. It handles the full reloading cycle on one machine, so you resize, prime, charge, seat the wad, drop shot, and crimp all at one station as you move the shell through.
The heart of this press is the Power Ring collet resizer, which squeezes each hull base back down to factory dimensions. That matters because it works on both brass and steel heads, high or low base, so your reloads chamber cleanly instead of giving you a sticky fit. Priming is handled by the E-Z Prime automatic primer feed, dispensing primers as you work rather than making you set each one by hand. The cam-action crimp die and Spindex crimp starter round out the finish, with the Spindex rotating on its own to line up with the shell's original crimp folds for a neat, factory-looking close.
What the Sizemaster Brings to the Bench
MEC sets the press at 2-3/4 inches from the factory, and it adjusts up to 3 inch shells when you need the longer hull. It ships with a 1 ounce charge bar for lead shot and three powder bushings, numbers 23, 25, and 29, so you have a workable starting range right out of the box. Additional bushings and charge bars are available separately if you want to dial in a specific load. A steady pace of 150 to 200 rounds per hour, roughly 6 to 8 boxes, is realistic once you get into a rhythm.
Who the 16 Gauge Sizemaster Suits
MEC has built its name on presses that make sense for folks just getting into shotshell reloading as well as those who have been at the bench for decades. The single-stage layout keeps the learning curve gentle while still giving you the control to tune loads for upland hunting, clays, or just keeping that heirloom 16 fed. For a gauge that rewards handloading, this press earns its keep.
Key Specifications
- Manufacturer: MEC
- Model: Sizemaster
- Manufacturer Part Number: 812016
- UPC: 098489015325
- Gauge: 16 Gauge
- Press Type: Single Stage
- Resizer: Power Ring Collet Resizer
- Priming: E-Z Prime Automatic Primer Feed
- Shell Length: Factory set at 2-3/4 inches, adjustable to 3 inches
- Charge Bar: 1 oz (lead shot)
- Powder Bushings Included: #23, #25, #29
- Loading Rate: Approximately 150 to 200 rounds per hour
- Crimp System: Cam-action crimp die with Spindex crimp starter
- Gauge Conversions: Available via separate die sets
What’s Included
- MEC Sizemaster 16 gauge single stage press
- E-Z Prime automatic primer feed
- 1 oz charge bar (lead shot)
- Three powder bushings (#23, #25, #29)
Frequently Asked Questions
Is the MEC Sizemaster 16 gauge a good press for someone new to reloading?
Yes, the Sizemaster is a solid first press. It is a single-stage machine, so you work one shell through each step at your own pace, which makes it easier to learn the process. MEC built the Sizemaster line to work for beginners and longtime reloaders alike.
What shell lengths will the Sizemaster 16 gauge load?
The press comes set from the factory for 2-3/4 inch shells, which covers most 16 gauge loads. It can also be adjusted to handle 3 inch shells if you need the longer hull.
Does the 16 gauge Sizemaster come with everything I need to start loading?
It includes the 1 ounce charge bar, three powder bushings (#23, #25, and #29), and the E-Z Prime automatic primer feed, so you have the core setup to get going. You will still need your own components like hulls, primers, powder, wads, and shot. Additional charge bars and bushings are available separately if you want to load a specific recipe outside the included range.
What does the Power Ring resizer on the Sizemaster do?
The Power Ring collet resizer squeezes each hull base back down to factory specifications so your reloaded shells chamber and extract cleanly. It works on both brass and steel heads, in high or low base configurations. This is one of the features that sets the Sizemaster apart from MEC's more basic presses.





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