For years, MEC has been manufacturing some of the highest-quality reloading products on the market, with MEC EC Primer 650 being just one example. This company strives to offer novice and seasoned reloaders the same level of service, with the goal being to enhance accuracy and performance. The EC Primer 650 is an excellent product used for high-volume reloading. With this, every session is maximized. This primer is made for Progressive presses and includes a plastic tray with metal brackets. In addition, the product is backed with a solid company guarantee. Automatic Primer feed for 650. Grabber and Hustler