I'm having a real pain of a problem with primers that appear to stick onto the end of the pin and are being perfectly reset into the shell as the pin is withdrawn. How can that happen?

I am thinking of grinding the end down a bit. Any thoughts???

Bob

What primers on what loader?

Some of the old-style CCI will stick on the Dillon decapper pins.

I haven't noticed any problems with current productiion.

If your pin is mushroomed, it will catch primers and needs to be replaced/modified.

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Science plus Art

Are you sure the decapping pin is protruding thru the primer pocket far enough? I think the problem is the pin is too short rather than too long.

All my sizing dies make a distinct ping as the primer pops out. Even if the pin were sticking to the primer, it should retain only the anvil. I think you need to adjust your decapping pin a bit deeper.

I have never experienced what you are describing. But Dillon has a design feature in their dies specifically for what you are describing.

Dillon depriming design

I had an issue like that with a set of Lyman dies once, the pin was too short and had to be replaced. In your case it might just need to be turned down more.

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Vaya con Dios

Chances are you have sharp edges on the decap pin. Round it off with some sandpaper or other gritty tool. You want a taper on the pin so the primer falls off easily.

If you using a Dillon die, another fix is to replace the decap pin with a Lyman pin - much smaller and clamps in straight and eliminates the problem.

Thank you all gentlemen for the info. I can see what I have to do. Take a good good look at the tip and grind it down a bit until she works. Or as suggested, and slimmer pin. Should work

By the way, the press is Dillon and the dies are RCBS.

How primers can draw back so perfectly is a mystery. They appear perfect as they were just primed. Hummmm

Bob

Those pins are some really hard metal. You would be able to feel if it was "buggered" at the tip. I would call RCBS before grinding away at anything. It sounds kinda strange??

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Still Running Against the Wind

I use Hornady and RCBS dies in my two Dillon presses and have experienced the mysterious "re-seated spent primer" only very rarely, perhaps five times or less in tens of thousands of rounds loaded. Some shooters experience this problem quite often and I heard that the cause is a squared-off decapping pin. I suggest rounding and polishing the tip of the decapping pin of you experience this with any kind of regularity.

Dave Sinko

I use both round and squared pins and never had a primer "reseat." I think I'd certainly feel it reseating. I suspect it's not being punched out at all. Like I said, the pin would be wedged in the anvil, which would pull out before the primer body seated.