A maddening day

[Brick]

Reloading 9mm Luger on my old RL 550B. I usually load in lots of 300 rounds. Today was aggravating because every 5th case or so the resizing die would not decap and the old primer would still be fully seated or worse half unseated. That meant stop remove the offending case, index the plate then try to resize again. Everything seems tight and right. The sizing die is down full on the shell plate at the full stroke of the ram, the shell plate is screwed down tight enough to allow just a slight amount of friction when the plate is indexed and everything else is where it belongs.

BTW it doesn't matter what cases WIN, F.C. C.B.C. Speer, R-P they've all done it. Not too long ago I took the dies apart and cleaned everything since I was switching away from cast lead.

So how about it any suggestions?

[Gunsnwater]

Military crimp? Broken pin. That pin sticks out a good bit. No way primer still in there if pin is long enough.

[:-)]

Is the primer getting stuck to the pin and being pulled back into the case on the way back down?
Is the pin damaged?

[frankski]

Decapping pin broken or loose.

[DukeConnor]

Check out the Brian Enos forum. This issue is discussed. There is a response from Dillon


https://forums.brianenos.com/topic/2...ng-die-issues/

[frankski]

If, as you say, the primers remain fully or partially seated, the decapping pin is likely not protruding far enough on the downstroke of the press. Primers pressed out but sticking to a sharp decapping pin is a different issue.