Description
The MEC 600 Jr. Mark 5 has earned its reputation as the go-to shotshell press for a reason. It has been on more benches than just about any reloader out there, and plenty of folks who start with one never feel the need to upgrade. Steel construction with compound leverage gives it a solid, no-nonsense feel, and a steady hand can run through four to six boxes of 12 gauge an hour once you get into a rhythm. That pace covers a weekend of clays or keeps a hunting season stocked without you living at the bench all week.
What Sets the 600 Jr. Mark 5 Apart
The cam-action crimp die is the heart of this press. It resizes each fired hull and returns it to its original condition, so your reloads feed and pattern like factory shells. The one-piece Spindex crimp starter swivels to line itself up with the original fold creases on the hull, which means a clean, consistent crimp every time instead of mangled star folds. It is set up for 2-3/4 inch shells out of the box and adjusts easily for 3 inch loads.
Dialing In Your 12 Gauge Loads
This unit ships ready to load lead 12 gauge with the included 1-1/8 oz charge bar and three powder bushings sized 29, 30, and 32. Swap bushings to match your powder and desired charge weight, and you can work through a range of popular field and target recipes. If you shoot more than one gauge, MEC offers die sets to convert the press down the road, so you are not locked into a single bore.
Room to Grow
Out of the box, the 600 Jr. handles each primer by hand, but it can be upgraded later with the E-Z Prime 285 CA primer feed to speed things up and take the fuss out of seating primers one at a time. It is simple enough for a brand new reloader to set up and learn on, yet built well enough that experienced hands keep coming back to it decade after decade. Mount it to a sturdy bench, grab your components and current load data, and you are ready to start making shells.
Key Specifications
- Manufacturer: MEC
- Model: 600 Jr. Mark 5
- Manufacturer Part Number: 844712
- UPC: 098489017374
- Product Type: Shotshell Reloading Press
- Press Type: Single-Stage
- Gauge: 12 Gauge
- Shell Length: 2-3/4" factory setting, adjustable to 3"
- Frame Material: Steel
- Loading Rate: 4 to 6 boxes per hour
- Charge Bar: 1-1/8 oz (lead shot)
- Powder Bushings: 29, 30, 32
- Priming: Built-in, upgradeable with E-Z Prime 285 CA
- Crimp System: Cam-action crimp die with Spindex crimp starter
- Length: 23.25 in
What’s Included
- MEC 600 Jr. Mark 5 single-stage shotshell press (12 Gauge)
- 1-1/8 oz charge bar
- 3 powder bushings (29, 30, 32)
Frequently Asked Questions
Is the MEC 600 Jr. Mark 5 a good press for someone new to shotshell reloading?
Absolutely. The 600 Jr. is one of the most common starting points for new shotshell reloaders thanks to its simple controls and forgiving operation. Many people learn on one and never feel the need to move up to anything else. Just add a scale to verify your charges along with your components and load data, and you are set.
What shell lengths does the MEC 600 Jr. Mark 5 load?
It comes set up for 2-3/4 inch shells and adjusts easily to handle 3 inch loads. That covers the vast majority of 12 gauge field and target hulls you'll run across. The adjustment is straightforward and does not require any extra parts.
Can the MEC 600 Jr. Mark 5 be converted to other gauges?
Yes. This press is a 12 gauge out of the box, but MEC offers 600 Jr. Mark 5 die sets to convert it to other gauges. If you shoot more than one bore, you can pick up the appropriate die set rather than buying a second press.
Does the MEC 600 Jr. Mark 5 come with a primer feed?
It has built-in priming where you handle each primer by hand during the cycle. If you want to speed things up, it can be upgraded with the MEC E-Z Prime 285 CA primer feed, which is sold separately and eliminates the need to seat primers one at a time.




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