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Thread: Cracked barrel extention

  1. #11
    Join Date
    Jun 2009
    Posts
    649
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    8 (100%)
    Gods telling you something, you should listen. I would get a refund and spend funds on a stronger rifle design if you plan on shooting more .450

    Sent from my M470BSA using Tapatalk

  2. #12
    Join Date
    Mar 2009
    Location
    Central TX
    Posts
    195
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    4 (100%)
    it looks like the indexing pin forced the metal around it to split.

  3. #13
    Join Date
    Aug 2010
    Location
    North Florida
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    2,679
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    New barrel assembly arrived from Remington / Bushmaster today. Took them about 3 weeks including shipping both ways which they paid for, both ways. I can't gripe about that. At my request they sent me a 16 inch replacement for the 20 inch that failed. That was kind of them. I'm happy.

  4. #14
    Join Date
    Jan 2014
    Location
    victorville, ca
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    48
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    0
    Just read your story. Glad they did the right thing.

  5. #15
    Join Date
    Jul 2006
    Posts
    2,207
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    7 (100%)
    I've seen maybe a dozen cracked barrel extensions-- all of them after a kaboom of some sort.

    My opinion, this one maybe cracked because of the caliber, but I don't know anything about the pressure profile of .450 BM..... or it was stressed upon being torqued onto the barrel and cracked or "tried" to crack then.

    In all honesty it may well hold up a good long time like that but obviously that is not the thing to do.

  6. #16
    Join Date
    Sep 2007
    Location
    AZ
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    27,217
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    14 (100%)
    I wonder if it's possibly the result of incorrect heat treat. I can remember a period where BCM couldn't get barrels finished for sale because the availability of correctly hardended extensions was low....

    But companies like bushmaster and many others were cranking out product. You get a barrel extension that is either too brittle or too soft, and the assembly is trash before the barrel is shot out.
    "You people have too much time on your hands." - scottryan

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