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Thread: Replacement barrel question

  1. #11
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    Okay, back from the dead...

    I replaced the barrel with a DD cut-rifled barrel from Brownell's. Everything is working great now that ADCO has tuned the gas system (see my related thread).

    The old barrel looked like it had a messed up crown, so I had a local gunsmith rethread and recrown it. I installed this on a gun I built from leftover parts (that was fun). Unfortunately, it's still keyholing with the Brown Bear ammo. Shoots Tula, Federal, and Lake City ammo just fine. I am pretty sure this is a 1/9 twist (based on what a DPMS tech told me; I bought the gun secondhand as a police trade-in).

    At this point, I think I'm just going to junk the barrel, but I figured I'd see if anyone had any further advice. I do intend to take the barrel to a 'smith and have the chamber/throat checked.
    Last edited by pakieser; 01-27-12 at 14:16.

  2. #12
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    Quote Originally Posted by pakieser View Post
    Okay, back from the dead...

    I replaced the barrel with a DD cut-rifled barrel from Brownell's.
    DD is making cut rifled barrels???
    "You people have too much time on your hands." - scottryan

  3. #13
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    Why scrap a barrel because it has a problem shooting one particular ammo? A poor quality ammo at that.

  4. #14
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    Quote Originally Posted by markm View Post
    DD is making cut rifled barrels???
    http://www.brownells.com/.aspx/pid=2...TRIPPED-BARREL

    I think these were discontinued. I picked mine up from Brownells about two years ago.

    Quote Originally Posted by Inkslinger View Post
    Why scrap a barrel because it has a problem shooting one particular ammo? A poor quality ammo at that.
    I pretty much agree, which is why I am trying to find a solution. The gun this barrel is going on is intended to be a "beater" that I can loan/rent to students who are taking my carbine class.

    Ideally, I'd like it to be able to handle the cheap ammo to keep costs down for the students. Price of ammo is a major barrier to training for a lot of people.
    Last edited by pakieser; 01-27-12 at 18:13.

  5. #15
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    Interesting. I wonder why they'd do cut rifling for a chrome lined barrel.
    "You people have too much time on your hands." - scottryan

  6. #16
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    I'd give it the kind of thorough cleaning described by a couple of folks above. A thorough cleaning is step 1 for any accuracy problem, any gun.

  7. #17
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    Quote Originally Posted by markm View Post
    Interesting. I wonder why they'd do cut rifling for a chrome lined barrel.
    Those barrels were made before they got their cold hammer forge up and running full time.

  8. #18
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    Even our tactical team guys have a hard time shooting out a barrel so I would try a bunch of the suggestions before scrapping it out completely.

    I shoot a fair amount (ok a lot) on my own, plus the regular qualifications for road patrol and now all the Tac team shooting and I haven't ever come close to killing a barrel.

    Now screwing it up by improper maintenance I could see happening with alarming regularity.

  9. #19
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    Quote Originally Posted by An Undocumented Worker View Post
    Those barrels were made before they got their cold hammer forge up and running full time.
    I'm not an expert on the subject, but I'd think they'd have gone button.

    Cut is the hardest and most expensive way, I think.
    "You people have too much time on your hands." - scottryan

  10. #20
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    Quote Originally Posted by markm View Post
    I'm not an expert on the subject, but I'd think they'd have gone button.

    Cut is the hardest and most expensive way, I think.
    I think it is more of a case of working with what equipment was available to them at the time.

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