This is an 8mm bolt, I used counterlocking nuts to make sure the number of threads screwed into the case did not change while I was extracting the case. This prevented the bolt from entering the case and bending the decapping pin.

    Note that the die has a split-lock ring on it. The normal lock-nut that comes with the die is very soft aluminium, and might get damaged. I also needed a larger diameter surface for the T-piece to sit on in the next step.

    Holding the die upside down, I put the T-piece on it as shown. This is why the larger diameter split-lock ring is usefull. An appropriate sized washer would do the same job if no split-lock ring is available.

    Lower the bolt and thread into the case with the nuts and washers positioned as shown. Tighten carefully with a spanner. The number of threads exposed in the 'Screw Depth' step need to be engaged here.

    After a few stiff turns, it was clear the case was backing out of the die. The T-piece has a built-in viewport on proceedings, and is very convenient for the purpose.

    The freshly removed case.