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Thread: Check your M1917's for safety issues. Eddystones especially..

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  1. #31
    Really Senior Member cplstevennorton's Avatar
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    Yeah I'm not saying don't shoot them. I will shoot any low number after reading the stuff I have now. I don't see any actual difference in the docs that make me anymore fearful of shooting a low number over a high number. In fact I see quite the opposite that the heat treatment can be bad on high numbers as well. I've seen about a dozen reports now of high numbers grenading on bad ammo. One guy lost a thumb. A couple lost an eye and so on.

    It's interesting because SA says not to build a magnum out of these receivers. They even state that proof rounds of 70,000 PSI are reaching the limits of what one can handle. One thing I found interesting they say they should not be used for rifle grenades, just like the low numbers. Stating that with the barrel plugged and the 40,000 PSI of the blank ammo, that is reaching the limits of the receiver.

    When you read that stuff, that is the same thing they state on low number receivers. So it's just interesting that when you compare them, they speak of both so similar.

    But yeah how many of these were built into magnums, when someone wrote in to ask them, SA was very firm on not doing that. That it wasn't safe.

    ---------- Post added at 07:42 AM ---------- Previous post was at 07:38 AM ----------

    The biggest thing I see over and over on these, check the headspace. They had a substantial amount that would not headspace, so a lot were cannibalized to try to get ones that would headspace.
    Last edited by cplstevennorton; 08-01-2019 at 07:40 AM.

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  4. #32
    Advisory Panel Patrick Chadwick's Avatar
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    Quote Originally Posted by cplstevennorton View Post
    June 24, 1947 Since May 26, 1947, RIA had continued to check receivers and have now examined a total of 230 Receivers. Of those 18 were cracked, and 3 had cracked barrels. They are telling Army Ordnance it is too time consuming and expensive to check all of these receivers. They recommend to Army Ordnance it's better to just state all eddystones should be used for drill or blank firing only.
    I can understand that if a barrel is screwed into a receiver by the sort of person who believes in tightening up wheel nuts until he hears a satisfying screech, then the force involved will create an enormous bursting pressure that may crack the receiver - or even initiate a crack that only becomes apparent much later.

    However, I utterly fail to understand how these forces - which create an equal compressive pressure on the barrel - could cause a cracked barrel.

    Could someone please enlighten me?

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    Really Senior Member cplstevennorton's Avatar
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    I did copy some WWI docs this last day as I had some time at the end of they day and couldn't make any other pulls.

    I only quickly scanned and took pics of them moving onto the next box, but there were a lot of issues with barrels it seems. Like of barrels bursting.

    I saw a lot of correspondence on M1917 faults and failures. It will just take me some time to read it as it was a lot of info.

    It's also always jumbled together in the boxes, so you have to pull it out and put in order and read it to get the full story.

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    Really Senior Member RC20's Avatar
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    I can understand that if a barrel is screwed into a receiver by the sort of person who believes in tightening up wheel nuts until he hears a satisfying screech, then the force involved will create an enormous bursting pressure that may crack the receiver - or even initiate a crack that only becomes apparent much later.



    However, I utterly fail to understand how these forces - which create an equal compressive pressure on the barrel - could cause a cracked barrel.

    Could someone please enlighten me?
    What we have here is a case of excessive exuberance.

    While the docs are valid historic writing, the data clearly is not.

    Nothing exists in a vacuum. If all the other data shows the 1917 was reliable and had no failures, then you have to question anything that says it was not.

    The 1917 was a common modified gun, lots and lots. It was used for large magnums due it its sturdy nature. Its been in the Greenland Patrol forever. The Danes made their own barrels for them they had them so long.

    Chuck in Denver has worked on 100s (new barrels) and reports a few W and R cracked.

    I have seen 20 Es and probably total of 30 E - R -W. None was cracked including an E that had a R barrel on it that had a thread cut off it.

    The Barrels all have witness marks and those barrels have their sight slots cut out BEFORE they are put on a receiver.

    So how can you over tighten a barrel that is matched t the witness mark?

    Let alone the Urban Legend of Pneumai Wrnehe (all pictures show hand install)

    And no you can't crack a barrel.

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