Winchester LP primers not sealing off pockets

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GBertolet posted this 1 weeks ago

I have noticed that the Win LP primers are pitting the breachface of my 45acp 1911. Federal and CCI primers do not do it. I suspect that the Win primers have a harder cup, and the low pressure of my 45 acp loads, do not allow obturation, allowing hot gasses to flow past the primer.

Being we have a primer shortage, and Win primers are all that I have, I would like to make a workaround. Would one of the commercial bullet/primer sealers be enough to block off the leaking gasses?

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Duane Mellenbruch posted this 1 weeks ago

What are the head stamps involved in the cases that are giving you problems and is it possible that the cases are suffering from enlarged pockets?  Or are you finding smudge marks on all cases, regardless of maker?  What are you using to clean the primer pockets to make sure debris is not a cause of leaks?

Is it your intent to apply sealant and then install the primer or apply sealant after the primer is seated?  Or both ways and see if it works at all?  This seems to be an issue I am not reading a lot about on other forums.

 

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Tim DeMarais posted this 6 days ago

Your primer pockets may be enlarged, even with low pressure loads, if they have been reloaded too many times.

I do not think primer pocket sealant is a good solution.

 

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GBertolet posted this 6 days ago

I mainly use range brass. At the action shooting matches, recovery of your exact brass is impossible. How many times they have been reloaded, is unknown. If the primer pockets are enlarged, why does it only happen with Winchester primers, and not Federal or CCI primers. There has got to be a reason.

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MP1886 posted this 6 days ago

Mic your primers and you'll probably find the reason Winchesters are loose.

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Tim DeMarais posted this 6 days ago

Using the Winchester primers may have changed the performance of your load. If the pressure and velocity are the same as your loads using Federal and CCI  there could be an issue with the primers.

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M3 Mitch posted this 6 days ago

Well, mastering the obvious, you could try increasing your load some and see if that cures the problem.

 

If you have a taper crimp die, you *might* (judiciously) increase the strength of the crimp. 

I guess you are using Bullseye, 3.5 of that is one of my favorite "softball" loads for the .45 ACP.  I think Bullseye is going to give you the sharpest pressure rise and best chance of obtruating (sp?) the primer.

If none of the above solve the problem, maybe you can trade the WW primers for another brand with somebody on here.

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Boschloper posted this 6 days ago

Some time back I was using Win LP primers and R-P brass for mid range .44 mag.  I was getting frequent pierced primers and gas cutting on the firing pin and breech face. After considerable experimenting, I concluded that at least that lot of primers and that lot of brass were incompatable.  Since I have brass from just about everyone my solution was to stay away from Win primers. Our current situation may make it difficult to use another brand of primers but you could sort your brass by brand and do a compatibility test.

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RicinYakima posted this 6 days ago

Usually tried to use WW primers in WW brass and Remington primers in Remington brass and Fed in Fed. In the olden days CCI's were always the largest in diameter and were just about impossible to put in WW cases in the winter in the shop. But then I normally clean primer pockets and recycle range brass I pick up, unless it appears to have been never reloaded. FWIW

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