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  1. #1
    Member snakehunter is on a distinguished road
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    Default Winchester Primers-Blowby

    People on other boards are reporting gas smudges on the base of their reloaded cases. They are attributing it to Winchester primers. I called Winchester and the guy I talked to said they were unaware of any problem with their primers. He suggested that anybody having this problem should send the spent primers to Winchester for analysis. He gave me a number to call for instructions on sending them: 618-258-3453

  2. #2
    Senior Member NGF Addict! CMonster will become famous soon enough CMonster will become famous soon enough
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    News to me.

  3. #3
    Junior Member xring3 is on a distinguished road
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    And how many times have the cases been reloaded??

  4. #4
    Senior Member NGF Addict! Win231 is on a distinguished road
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    It's likely that there is nothing wrong with the primers, but some brands of cases are not a good match for some brands of primers. There is a variation in the size of primer pockets as well. If a primer is too easy to seat, it doesn't fit snugly & there will be some gas blow by. Hot loads could also cause it.

  5. #5
    Member ronl is on a distinguished road
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    Sounds like loose primer pockets to me. Cases should be tossed.

  6. #6
    Dr. of Loadology Gunrnr is a member to emulate Gunrnr is a member to emulate Gunrnr is a member to emulate Gunrnr is a member to emulate Gunrnr's Avatar
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    Win pistol primers are very slightly smaller in diameter than CCI. I have used this fact to my advantage for many yrs by using them for several foreign cases (in .45 ACP) such as S&B, Magtech and Privi, that have smaller primer pockets.

    I know...I know...spec says they're all the same. But they're not. A micrometer belonging to a friend, that is much more accurate than my own, shows appx 0.00001 to 0.000015 delta between Winchester and CCI, with Winchester being smaller.

    We did not find this difference in rifle primers. I cannot explain any of these facts but I can confirm them with my own experience. It has saved me throwing many, MANY perfectly good cases into the scrap pile.

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