The MEC E-Z Prime V for 600 Jr. Mark V and Versa MEC 700 features a self-lubricating plastic tray and is designed for 12 gauge shotshell reloading. This automatic primer feed eliminates handling individual primers and automatically feeds them for use, streamlining your reloading workflow and allowing you to focus on other critical loading steps.
The proprietary design eliminates the need to handle, store, or break down primers, allowing you to work with thousands of primers without touching them individually, while the hopper holds reload-ready primers and the spout and notch on the primer catcher easily release primers at the touch of a button. The unit features strong metal spring-loaded gates that easily fold up for smooth feeding and prevents primers from being knocked out while in transit or storage.
This upgrade converts your MEC single-stage 600 Jr., 600 Jr. Mark V, Sizemaster, or Steelmaster loader to automatic priming capability, significantly reducing reloading time and fatigue. Ideal for shooters who process shotshells regularly and want to maximize their press efficiency without investing in a progressive reloader.





