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The ZERO M-Series Sizing Dies are a great product with some incredible features – but they require a wide-rimmed shellholder. These have long been available for purchase with the dies, and are now available on their own.

The product selection is simple. Pick the press you have, then the shellholder size you need.

For traditional presses (Rock Chucker, T-7, etc), the shellholders come with the stud/groove style that you find on common shellholders, and they click right into the ram.