XCR-M: Fluting a light barrel
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Thread: XCR-M: Fluting a light barrel

  1. #1
    Newbie Mjmastr's Avatar
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    XCR-M: Fluting a light barrel

    Sent my 16" light .308 barrel to ADCO to get cut down and fluted. They told me they can't flute it because it's a tapered barrel, unless they contour it so that it's straight. So...is it a bad idea to make the contour flat (on an already light barrel) and then flute it? Is this compromising the barrel's strength too much?
    I've seen a lot of threads on fluting a heavy barrel but none on a light. Just want to make sure I don't do something stupid.
    Thanks.

  2. #2
    XCR Guru fmunk's Avatar
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    These are just my thoughts and by no means the definitive answer. I think it's a bad idea to trim the contour. I'm assuming the tapered barrel is thicker towards the chamber? That is where material is needed the most. Trimming it down to get a straight contour will likely affect your accuracy and barrel harmonics; by how much? I do not know. The S&W M&P 10 has a tapered 18" barrel, and its accuracy is well documented in various online reviews. Given the -M's record for accuracy, I would not do anything to that barrel to make it even less accurate.
    Fool-proofing serves only one purpose: identify bigger fools.

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    Newbie Mjmastr's Avatar
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    Correct--the barrel is thicker toward the chamber, but when you look at it, it's a very very slight taper (I didn't even think it was tapered until they told me it was). This makes me think it might not be that big of a deal to make it totally straight, but I'm not an expert...

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    XCR Guru navalbeaver's Avatar
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    Just me, but if the taper is that small, I can't imagine the effort/hassle is worth the weight savings.

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    Newbie Mjmastr's Avatar
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    XCR-M: Fluting a light barrel-img_20150116_105145545.jpg

    Ended up going for it. We'll see how she does. Feels a bit lighter at least!
    Bravo and Merlin like this.

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    Newbie Mjmastr's Avatar
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    XCR-M: Fluting a light barrel-img_20150116_105159972.jpg
    XCR-M: Fluting a light barrel-img_20150116_104312718.jpg

  8. #7
    Expert crusoe's Avatar
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    Quote Originally Posted by Mjmastr View Post
    Click image for larger version. 

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    Ended up going for it. We'll see how she does. Feels a bit lighter at least!
    We are looking forward to a before and after accuracy report. It looks good.

  9. #8
    XCR Guru fmunk's Avatar
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    Another fine job by ADCO.
    Fool-proofing serves only one purpose: identify bigger fools.

  10. #9
    Expert wombat338's Avatar
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    Yeah, they do good work. However, the benefits of fluting a light barrel are almost entirely cosmetic.
    “Americans have the right and advantage of being armed – unlike the citizens of other countries whose governments are afraid to trust the people with arms.” -- James Madison

  11. #10
    XCR Guru fmunk's Avatar
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    Quote Originally Posted by wombat338 View Post
    Yeah, they do good work. However, the benefits of fluting a light barrel are almost entirely cosmetic.
    Depends on the context. It does remove material, thus decreasing weight. It also increase surface area, thus aid cooling... theoretically. Real question is by how much and does it make enough of a difference to be considered a real functional enhancement. Definitely not done with cosmetics in mind here as the fluted portion is hidden from sight.
    Fool-proofing serves only one purpose: identify bigger fools.

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