MEC 600 Jr Pre Mark 5 Die Set Features The MEC 600 Jr Die Set is machined from steel giving it the durability to withstand repeated resizing and crimping cycles without excessive wear. Designed specifically to convert a Pre Mark 5 MEC 600 Jr press to .410 bore this die set lets reloaders expand their gauge capability using equipment they already own. Precision tooling ensures shells sized and crimped with this set maintain consistent dimensions which matters for reliable chambering and patterning. Reloaders who shoot multiple gauges can keep a single press on hand and simply swap die sets as needed. MEC has built a long standing reputation for dependable shotshell reloading equipment and this die set carries that same attention to fit and function. Converting to .410 bore opens up reloading options for a gauge that is often more expensive to buy loaded compared to larger gauges making it a practical choice for frequent shooters. The steel construction resists the wear that comes from repeated press cycles better than lighter alternative materials. This MEC 600 Jr Pre Mark 5 Die Set is available for sale at GrabAGun for shotshell reloaders looking to add .410 bore capability to their existing press. MEC 600 Jr Pre Mark 5 Die Set Specifications Manufacturer: MEC Model: 600 Jr Pre Mark 5 Die Set Type: Reloading Die Set Material: Steel Caliber: .410 GA Available At: GrabAGun