Model 361 denting brass
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Thread: Model 361 denting brass

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    Model 361 denting brass

    I normally use the same lane when we go to the range. I noticed today that it was slinging brass ten more feet than usual. Also all the brass was dented as in picture. Both brass and steel are denting. When I got home, I pulled out my brass from the last trip, none was dented. I always swab the barrel after every trip, but other than that I have not touched it. Pulled dust cover, everything spick-and-span except cosmoline that seems to come from somewhere. And a very small amount at that. This gun has had less than 500 rounds since 1999 or so. And normally 20 to 40 rounds at a time/per trip to the range. Last time I had it at the range was the warmest I have ever had the gun. I put a hundred rounds through it in a relatively short amount of time. I am shooting out of the exact same ammo as last trip also. Even the same batch of ammo.
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    I have ammo older than my ex-wife

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    Dang, this was supposed to go in the Galil subsection. I apologize.
    I have ammo older than my ex-wife

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    Cosmoline oozing out of the bolt onto the face making for a sticky and violent ejection?
    Big thanks to Moses1986, 10Gauge, Pookie, NFA ARMS, Duck Durbin and all Honorable Members of the U.S. Armed Forces.

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  5. #4
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    I don't know,when I cycle the rounds through without firing them.. no dents.
    I have ammo older than my ex-wife

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    Quote Originally Posted by Longdistance View Post
    I don't know,when I cycle the rounds through without firing them.. no dents.
    You can’t hand cycle at the speed of normal firing.
    Big thanks to Moses1986, 10Gauge, Pookie, NFA ARMS, Duck Durbin and all Honorable Members of the U.S. Armed Forces.

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    I may have found the issue. I gave it a full disassembly and found cosmoline in the gas tube. The port appeared clean, but I hit it with a pipe cleaner and gave the tube a good cleaning. The piston grooves we're full also. So if I'm understanding right from what I have read, it was over gassing.
    I have ammo older than my ex-wife

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    These rifles are heavily over gassed. You can modify the gas piston or buy the KNS adjustable one.

    If originality is important you could buy a spare gas piston and modify that after swapping it in for the stock one.

    Hint, you can buy 2 or 3 gas pistons for one KNS adjustable one.
    needs moar AK

    or beer


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    With the grooves be open up to allow more bypass?
    I have ammo older than my ex-wife

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    No more mangled brass! Took it out after work and put 30 rounds through it. All is well, and a lesson learned. I even found the date stamp on the barrel, 6 of1982, when I disassembled it for cleaning.
    scottyb likes this.
    I have ammo older than my ex-wife

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    Great you were able to fix it. Can you post a picture of these grooves you're talking about?
    Rights are inherent. They do not come from another's wallet.

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    20200205_184616_1580946555395.jpg Those grooves were full of cooked cosmoline(just behind piston) I am assuming that sealed the gas system up too tight. I've noticed that I've got the tiniest of dents while playing around this weekend. Before it was putting 1/2 inch long dent in the side of the cartridge. I think I may end up ordering an adjustable system or buying a spare piston and modifying it myself.
    I have ammo older than my ex-wife

 

 

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