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De-Priming Problem

#1 User is offline   kmitchl 

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Posted 26 October 2009 - 06:24 PM

I load on a 650 and am seeing a few cases of every 100 where during sizing and de-priming the cylindrical part of the primer stays in the primer pocket and the top of the spent primer gets pushed off. When the case goes to the next station for priming and powder the primer will start but will not fully seat. This happens with both Dillon and Lee sizing dies and with different headstamp brass. Any suggestions for a a cure.

#2 User is offline   G-ManBart 

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Posted 26 October 2009 - 07:27 PM

What cartridge and are you sure the primers aren't crimped in? R,
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#3 User is offline   calishootr 

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Posted 27 October 2009 - 03:55 AM

my last set of .40 dies from dillon the decapping pin was now spring loaded, which i didnt realize, till i resize the first case and hear a LOUD ca-ching!!!! sound, which scaredthe crap out of me, thought i had snapped a decapping pin on a unseen bedan primed case....turns out the decapper is literally shooting the primer out ofthe pocket, pretty cool, once you get used to the noise and tell yourself its not broken

#4 User is offline   kurtm 

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Posted 27 October 2009 - 04:24 AM

Take your decapping pin and stone the end into more of a cone instead of just rounded from the factory. What is happening is that the decapping pin is wider than some of the primer anvils and gets stuck so an the down stroke, after resizing, it is pulling them back into the case, always seems the worst with CCI primers, but once tapered, NOT TO A SPEAR POINT, but gently tapered, you will never have any trouble. I even do this to the Dillon decapping pin! KurtM
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#5 User is offline   kmitchl 

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Posted 27 October 2009 - 07:12 AM

View PostG-ManBart, on Oct 26 2009, 09:27 PM, said:

What cartridge and are you sure the primers aren't crimped in? R,


Out of the last 100 .45 rounds I loaded there were three Winchester, one Speer and one Starline case, none with a crimp.

To KurtM - Reshaping the decapping pin has already been done. It's not resetting the whole primer, it's shearing the cap of the primer (the part the firing pin impacts) and leaving the cylindrical part of the primer in the primer pocket.

#6 User is offline   SLM 

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Posted 27 October 2009 - 07:27 AM

Are these fairly "fresh" cases or stuff you've picked up off the range? I've had it happen with some pick-up stuff that I have no idea how long had been laying around. The primers are basically corroded in and it just pops the end off. Sometimes I notice a different sound/feel when it happens but not always. The only "fix" I've come up with is to take a Hornady crimp remover and cut the offending primer out.
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#7 User is offline   kurtm 

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Posted 27 October 2009 - 07:28 AM

Wow, I have never heard of that. The 3 parts to a primer are the cup ( one solid piece) the anvil and the coompound. The cup is extruded and is one peice. Either you have a REAL hot load and are flattening the primer soo much that the cup is breaking into two peices, or you have a breach face problem. Thats the only thing I can come up with. KurtM

This post has been edited by kurtm: 27 October 2009 - 07:29 AM

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#8 User is offline   wide45 

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Posted 27 October 2009 - 02:33 PM

I think it's called a ringer, and many years ago there was a tool for removing the tiny rings.
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#9 User is offline   Intel6 

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Posted 27 October 2009 - 04:20 PM

It is called a ringer and they cause a devastating machine crash when loading on automated equipment. I worked for a commercial reloading company in college and when we got ringers in a batch of brass we usually set it aside. when you are loading 30K+ rounds a day a crash is not a good thing. The bad thing with them is that if you try and force in a primer it will usuallly go off.

They are usually caused by the brass getting wet and when the liquid dries it would leave depositis of stuff and "glue" in the primer.

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#10 User is offline   kmitchl 

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Posted 27 October 2009 - 04:38 PM

View PostSLM, on Oct 27 2009, 09:27 AM, said:

Are these fairly "fresh" cases or stuff you've picked up off the range? I've had it happen with some pick-up stuff that I have no idea how long had been laying around. The primers are basically corroded in and it just pops the end off. Sometimes I notice a different sound/feel when it happens but not always. The only "fix" I've come up with is to take a Hornady crimp remover and cut the offending primer out.


I think you diagnosed the problem. I got a Brass Wizard several months ago so I'm probably not as selective in what I pick up now. I looked at the cases again and although tumbled to polish all appeared have been left out in the weather for an extended period. The water and powder residue promote corrosion of the primer cup. The decapping process causes the cup to fail at the thinnest part.

#11 User is offline   DougCarden 

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Posted 28 October 2009 - 05:34 AM

Neal nailed it. I got a "deal" on a large batch of 38 special brass that had been sitting in ammo cans for 30 years.....Good stuff, but I think I remember at leat 7 "ringers" in the batch. Pain in the a**. Not much you can do except pay attention to the dead primer dump. If you dont see the dead primer fall out or hear it, then stop and check. Even then it is no guarantee....sucks big time with a 1050..... :wacko:
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#12 User is offline   Intel6 

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Posted 28 October 2009 - 08:57 AM

Doug, the brass I was talking about was .38 SPL. The company I worked for loaded for LAPD in CA when they were still shooting revolvers. We used to load 700,000 rds of .38 a month for them and the brass came back in the smaller glavanized trash cans. Once, one of the cans was left out in the rain and we started getting a lot of ringers and finally figured out why. We had a sorting machine that kicked out anything that wasn't a .38 and also checked for split cases and ringers. The sensor that kicked out the ringer cases stopped working and we had a bunch of ringers in the brass to be loaded.

That was a hell of a gig though, I shot as much .38 as I wanted (blems) for free back then. My normal routine was at least 800 rds a week double action and there were times when I shot more.

Neal in AZ

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