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Need help with new AR build

Discussion in 'Rifle Country' started by SATX man, Jul 23, 2007.

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  1. SATX man

    SATX man Member

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    HI everyone I going to build another AR rifle this time a 20" CMMG. The question I have is there any advantage over a crome lined barrel compared to a stinless steel barrel?
     
  2. DnPRK

    DnPRK Member

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    Stainless has the capability to be a more accurate barrel if machined properly. That's why the benchrest guys use stainless in their quest to shoot 0.10" groups. Chrome works well for military use where a soldier/Marine may not get a chance to clean his bore often.
     
  3. Bartholomew Roberts

    Bartholomew Roberts Moderator Emeritus

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    I've been trying to answer this question myself and haven't come up with a good answer yet. Best I can tell, chrome may have a tiny longevity and reliability advantage when used in high-heat shooting. Stainless steel on the other hand has a small accuracy advantage.
     
  4. Canuck-IL

    Canuck-IL Member

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    So, is it fair to rank chrome-moly has middle of the road...a little better lifespan than SS but also somewhat more accurate than chrome lined? A compromise solution...?

    /Bryan
     
  5. Bartholomew Roberts

    Bartholomew Roberts Moderator Emeritus

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    Well to be fair, the accuracy is more a function of the time and attention given the barrel than the materials. There are several examples of chrome-lined barrels with excellent accuracy. The degree of difference in accuracy is so small you'll never see it without a rest or other extremely stable platform.

    On the other hand I don't know that the claimed longevity difference is all that noticeable either.
     
  6. Canuck-IL

    Canuck-IL Member

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    But the expected longevity is more easily discerned, right? So IYO would the order be (assuming comparably hot loads), chrome, chrome-moly, SS as max to min expected life?
    /B
     
  7. Bartholomew Roberts

    Bartholomew Roberts Moderator Emeritus

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    That sounds about right; but based on the anecdotal evidence I have so far, I would expect the longevity difference between the top and bottom to be about 2-3k max.
     
  8. Canuck-IL

    Canuck-IL Member

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    Good to have an informed opinion - thanks!
    /B
     
  9. SATX man

    SATX man Member

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    Thanks everyone I am going to be getting a crome lined barrel instead of the SS one. Has anyone herd of a company called Sabre Defense?
     
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