MEC 650 Primer Seating Assembly 12 Gauge

Precision Primer Seating for Shotshell Reloading

Proper primer seating depth is fundamental to reliable shotshell performance. The MEC Primer Seating Assembly ensures your primers are seated to the correct depth—flush with the case head—every time.

Why Seating Depth Matters

Too Deep: Primers seated below flush can damage internal components, leading to inconsistent ignition and misfires that compromise both safety and performance.

Too High: Primers seated above flush create problems in semi-automatic shotguns when the bolt closes, and can interfere with cylinder rotation in pump guns.

What You Get

This assembly includes everything needed for reliable primer seating:

• Seating post
• Spring
• Guide
• Seating pad

Compatibility

Designed for MEC 650 and 8567 progressive reloading machines manufactured before 1985. This is a direct replacement component that restores your machine to factory specifications.

The MEC Advantage

MEC has been the standard in shotshell reloading for generations. Reloaders trust MEC components because they deliver consistent results, shot after shot. When precision matters—and it always does—choose the primer seating assembly that professionals depend on.