Seating depth is the whole game with a primer seat: too deep and you can damage internal components and cause misfires, too high and a revolver’s cylinder won’t rotate freely or a semi-auto’s bolt can slam into a primer that’s sitting proud. MEC built this primer seat (part no. 525CA12) for its single-stage shotshell presses to get that depth right, consistently, shot after shot.

Key Specifications

• Built for MEC single-stage shotshell presses.
• Avoids over-deep seating, which can damage internal components and cause misfires.
• Avoids under-seating, which can prevent cylinder rotation in revolvers or cause bolt-slam issues in semi-autos.
• Measures roughly 5.15 inches in length.

Frequently Asked Questions

Why does primer seating depth matter? Seating too deep can damage internal components and cause misfires; seating too high can prevent a revolver’s cylinder from rotating or risk a semi-auto’s bolt striking a proud primer.

What press does this fit? MEC’s single-stage shotshell reloading presses.

Buy the MEC Primer Seat, Single Stage

Order the MEC Primer Seat, Single Stage from our Lubbock, Texas gun shop to keep your primer seating consistent. See our full reloading equipment selection for other MEC press parts.