Page 2 of 3 FirstFirst 1 2 3 LastLast
Results 11 to 20 of 22

Thread: Barrels: Chrome v. Chome-moly v. Nitride

  1. #11
    Scheiße. Mr_Posthumous's Avatar
    Join Date
    Nov 2009
    Posts
    1,260
    Feedback Score
    11 (100%)

    Default

    I just bought a Chrome molly barrel from EBRGs so once i build a rifle around it and shoot the living piss out of stuff with it ill let you know how it holds up

  2. #12
    Gunco Rookie Lock N' Load's Avatar
    Join Date
    May 2010
    Posts
    10
    Feedback Score
    0

    Default

    A topic I know something about. I can say that a stainless H-Bar elite 24" AR I built a decade ago was the most accurate 5.56 I ever saw. For durability though chrome lining cannot be beat. There is a slight loss of accuracy due to the chroming process not being able to deposit a perfectly even layer of material. This is true with electro-plating as well as the chem only electro-less systems in use. I don't know if anyone re-grinds the lands (this would help accuracy). If some company could devise a way to grind both chromed lands and grooves, I think they would have built a better mouse trap. Or at least a better mouse shooter.

  3. #13
    Gunco Member mortismaker's Avatar
    Join Date
    Jun 2005
    Posts
    60
    Feedback Score
    0

    Default

    There are many names for nitride treatment (Glock=tennifer, melonite, hard blue, etc...). It is all pretty much the same result. The processes can differ from a hot bath to atmospheric heating in a chamber. This video is a decent example:


    Now guys, I am NOT a metallurgist or a chemical engineer, I just love to learn and research everything. Everything I've written here are the facts as I understand them. Basically they heat up the item in a high nitrogen-carbon rich environment. This allows a symmetrical case hardening of the material with the inner core metal at the same hardness levels. This allows a harder than chrome surface that is not brittle. This is not a new process, I believe there are some weapons from Switzerland or Sweden (always get them confused) that were nitride treated back around 1900's.

    I personally believe that if done correctly, this is a superior product than chrome due to the fact that this cannot flake off, doesn't degrade accuracy, is harder (at minimum is as hard) as chrome, treats the entire structure (bore, port, outside, etc...), and can in theory make a less expensive barrel steel equal to any other in terms of function.

  4. #14
    Gunco Member mortismaker's Avatar
    Join Date
    Jun 2005
    Posts
    60
    Feedback Score
    0

  5. #15
    Gunco Rookie wneubauer's Avatar
    Join Date
    Jul 2010
    Posts
    10
    Feedback Score
    0

    Default

    I'll be curious to see which lasts longer, my AR or my Mosins? Neither are chrome lined. I will say those Mosins are tough old Russian mules and good shooters..

  6. #16
    Gunco Veteran [486]'s Avatar
    Join Date
    Dec 2008
    Location
    MSP area, MN
    Posts
    1,631
    Feedback Score
    0

    Default

    Probably the mosin, pretty much anything in .224 diameter bullets will run into throat erosion. Thinking on that, I like the design of the .22 hornet, it's long neck probably reduces turbulence in the chamber's throat by giving the gasses time to "calm down" before leaving the case...

  7. #17
    Gunco Member American Rage's Avatar
    Join Date
    Jan 2005
    Posts
    253
    Feedback Score
    0

    Default

    I ended up getting a chrome lined for my new midlength AR.

    I like the fact that I don't have to clean it as often, also it's very accurate.


    Rage

  8. #18
    Gunco Veteran [486]'s Avatar
    Join Date
    Dec 2008
    Location
    MSP area, MN
    Posts
    1,631
    Feedback Score
    0

    Default

    Whoo for chrome lined AR barrels. If it's a reasonable quality one with a smoothly machined chamber then you shouldn't ever need to clean it out. Only if you noticed decreased accuracy from copper fouling, but I dunno if I'd be able to tell the difference, lol.

  9. #19
    Gunco Veteran jreifsch80's Avatar
    Join Date
    Jan 2010
    Location
    colorado
    Posts
    1,253
    Feedback Score
    2 (100%)

    Default

    Nice discussion guys I've know about nitrade hardening a while as its a common treatment to high performance camshafts (and many other parts) as stated earlier.

    One question though, on dsa's nitrade hardened ak barrel they sell, how would one go about drilling the barrel pin holes and all that? Carbide?

  10. #20
    Gunco Member mortismaker's Avatar
    Join Date
    Jun 2005
    Posts
    60
    Feedback Score
    0

    Default

    Quote Originally Posted by jreifsch80 View Post
    Nice discussion guys I've know about nitrade hardening a while as its a common treatment to high performance camshafts (and many other parts) as stated earlier.

    One question though, on dsa's nitride hardened ak barrel they sell, how would one go about drilling the barrel pin holes and all that? Carbide?
    I have heard rumors that drill bits and cutting bits don't last long against near diamond hardness. Chambers are said to not be ream-able. I know that many companies that perform nitride treatment have all the machine work done first. If you saw the video I posted of the file on the treated barrel you'll get why. Very hard stuff. Might want to drop DSA an email and ask.

    Please post their response if you do. I would also like to know.

    Mortis...

Page 2 of 3 FirstFirst 1 2 3 LastLast

Search tags for this page

There are currently no search engine referrals.
Click on a term to search our site for related topics.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •