Forster Bench Rest Full Length Sizer Die 300 AAC Blackout Full-Length Sizing Die (with elevated expander button) Elevated expander button allows better alignment of case and neck. If using Forster Dies in a Forster Co-Ax press shellholders are not required since Forster presses d If using Forster Dies in any non-Forster press use shellholders that are recommended by the press ma