Description
The MEC 600 Jr. Mark 5 has earned its reputation as the most popular single-stage shotshell reloader out there, and this version comes ready to load .410 bore shells right out of the box. It ships set at 2-1/2 inch length and can be adjusted to handle 3 inch shells when you want to stretch your loads a little longer. The steel frame gives you a solid, stable platform that holds up to years of regular use, and the single-stage layout keeps each step clear and simple whether you're new to reloading or you've been at the bench for decades.
What Makes the 600 Jr. Mark 5 Worth a Spot on Your Bench
This press walks you through the whole process one operation at a time: resize and decap, prime, charge your powder, seat the wad and shot, then crimp. The cam-action crimp die brings each shell back to its original condition, and the Spindex crimp starter swivels on its own to line up with the shell's existing creases so your finished crimp looks clean every time. Priming is built right in, which keeps things efficient without extra add-ons. At a comfortable working pace you'll turn out roughly four to six boxes an hour, or around 150 to 200 shells.
Setting Up Your MEC 600 Jr. Mark 5 for .410
The .410 bore configuration comes with a 1/2 ounce charge bar plus powder bushings numbered 10, 11, and 12, which cover a good range of common loads. The multi-size thread pattern accepts standard shotshell components, and if you ever want to load a different gauge down the road, MEC offers die sets to convert the press. Reloading .410 is a smart move since factory shells for this bore can be pricey and tough to find, so building your own target or small-game loads puts you back in control of both supply and cost.
Compact enough to fit just about any workspace, the 600 Jr. Mark 5 delivers the kind of dependable, repeatable performance that has kept this press at the top of the heap for generations of reloaders.
Key Specifications
- Manufacturer: MEC
- Manufacturer Part Number: 8447410
- UPC: 098489016179
- Model: 600 Jr. Mark 5
- Caliber/Gauge: .410 Bore
- Press Type: Single-Stage Shotshell Reloader
- Shell Length: Factory set at 2-1/2", adjustable to 3"
- Frame Material: Steel
- Priming: Built-in
- Loading Rate: Approximately 4 to 6 boxes per hour (150-200 shells)
- Charge Bar: 1/2 oz.
- Powder Bushings: 10, 11, 12
- Thread Pattern: Multi-Size
- Stations: 1 (single-station)
- Gauge Conversions: Yes (die sets sold separately)
What’s Included
- MEC 600 Jr. Mark 5 single-stage shotshell press (.410 bore)
- 1/2 oz. charge bar
- Powder bushings #10, #11, and #12
Frequently Asked Questions
What shell length does the MEC 600 Jr. Mark 5 come set up for?
This press ships from the factory set up for 2-1/2 inch .410 bore shells. It can be adjusted to load 3 inch shells when you want longer loads. The adjustment is part of the press, so you don't need to buy anything extra to make the switch.
How many shells can the 600 Jr. Mark 5 reload per hour?
At a comfortable working pace you can expect roughly four to six boxes per hour, which works out to about 150 to 200 shells. Since it's a single-stage press, you complete each step one at a time, so your actual speed depends on your rhythm at the bench. It's a great fit for small-batch loading rather than high-volume production.
What comes included with the .410 version of this press?
The .410 bore model includes a 1/2 ounce charge bar along with powder bushings numbered 10, 11, and 12. Those cover a solid range of common .410 loads right out of the box. Die sets for converting to other gauges are available separately from MEC.
Can the MEC 600 Jr. Mark 5 be upgraded with an automatic primer feed?
The press has built-in priming, so you can load without any add-ons. MEC's 285 CA primer feed upgrade that speeds primer handling on other models is not offered for the .410 bore configuration. For .410 reloading, you'll handle priming with the press as it comes.




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