Spent primers not coming out of 10mm brass


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Shmackey
December 27, 2011, 02:14 PM
I started loading 10mm a few months ago--first on an LnL and now on a 650. I didn't have this problem with the LnL, but I don't think I was using my own hot-loaded, fired brass then.

The problem: A case will get through the resizing/decapping die, and into the priming station, with the old spent primer still in the case. The primer usually has visible signs of having met up with the decapping pin unsuccessfully: it's rounded on top.

I know there have been reports of this from Dillon users, but their problem seems to be with the decapping pin on the Dillon die, and I'm using Hornady 10mm dies. I've adjusted the die so there's extra decapping pin showing, but I'm still getting this problem with maybe 1 of 15 cases.

Could it somehow be tied to the brass being loaded fairly hot and the primers flattening out? This didn't happen with my LnL, but (1) I think I was using new or other people's once-fired brass then, and (2) I don't see how it could have anything to do with the press. (Or could it?) I'm not sure if I should adjust the die to expose even more decapping pin, mess with the shape of the pin itself, or try a different sizing die altogether, perhaps one with a spring-loaded decapping setup.

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rcmodel
December 27, 2011, 02:20 PM
I'm not sure if I should adjust the die to expose even more decapping pin, Sure you should.

Nothing to stop you till the rod with the pin in it is hitting the case web.
Run the case all the way up in the die and screw the decapping rod down till it hits the bottom of the case.
Then back it off 1/2 turn and lock the lock-nut.

If that still isn't enough, you need a longer pin.

I make them out of 1/16" music wire from the hobby shop.

A 36" length will last the rest of your life.

rc

ReloaderFred
December 27, 2011, 03:00 PM
What is happening is the anvil is sticking to the decapping pin. When the case is withdrawn from the die, the decapping pin is pulling the primer back up into the primer pocket.

I normally cure this problem by polishing the tip of the decapping pin, but don't make it too sharp or it will puncture the primer cup. You just want to take the roughness off the pin so the anvil won't stick to it.

Hope this helps.

Fred

rcmodel
December 27, 2011, 03:04 PM
That being the case, a little dab of sizing lube or paste wax on the end of the pin can help too.

rc

gamestalker
December 27, 2011, 03:06 PM
There are three simple solutions to your problem, adjust, adjust, and adjust your decapping pin until primer's are consistently pushed out. The suggested adjustment is 3/8" exposed from the die, but if that isn't enough, then just continue adjusting as needed, but not to the extent you are hitting the web.

Shmackey
December 27, 2011, 03:29 PM
Okey doke--I'll try all of these suggestions, one at a time. Thanks, guys.

beatledog7
December 27, 2011, 04:34 PM
This has happened to me with an RCBS .357 die. Polishing the pin with a tiny dot of Flitz on a paper shop towel solved it. I've added that step to my die maintenance regime.

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