MEC 600 Primer Seating Pad - Steel Replacement Part

The MEC 600 Primer Seating Pad is a factory replacement component for MEC shotshell reloading presses. Built from steel with a black finish, this small spring pad sits inside the primer seating assembly and provides the tension needed to properly seat primers into freshly resized shotshell cases during the reloading cycle.

Designed as an exact factory replacement, this pad fits the MEC 600 Jr. Mark 5 progressive press and the MEC Sizemaster single-stage press, as well as any MEC progressive loader manufactured after 1982. Whether you are replacing a worn original or keeping a spare on the bench, the MEC #331 primer seating pad restores consistent primer seating feel and function to your press.

Proudly made in the USA by Mayville Engineering Company (MEC), this genuine OEM part is the same component originally shipped with the press, so fit and function match factory spec.