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Cold hammer forged barrels?

Discussion in 'Rifle Country' started by 1911 guy, Oct 25, 2012.

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  1. 1911 guy

    1911 guy Member

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    I know what cold hammer forging is and how the rifle barrels are made this way. What I do NOT know is what the real advantages are to a CHF barrel as opposed to a "conventional" barrel.

    The skinny: This is the last decision I have to make before getting all the parts for my latest AR build. I can get one of two barrels that have identical specs, but one is CHF and the other is not. The barrels are offered by E.R. Shaw and Bravo Company. Price difference of $25. Both barrels are chrome lined government profiles with 1:7 twist.

    What am I gaining or losing with or without the cold hammer forging? This rifle will not be used extremely often, but when it does it will be for HD, training classes and paper punching. Reliability is utmost, but I'd like to retain as much accuracy as I can in the process. The BCM barrel is CHF and proofed/inspected. I've had chromed Shaw barrels in the past that shot extremely well with pet loads. So am I gaining or losing by going to the hammer forged from BCM?

    If it matters, the rest of the build is:
    S&W M&P15 stripped lower
    DoubleStar parts kit
    KNS pins (I know, not really necessary)
    A2 tube, spring, buffer and stock
    Aero precision stripped flat top upper
    BCM bolt and carrier
    M.I. Gen II SS 15" free float tube
    Low profile gas block to fit under the tube
    Flip up irons (undecided between MagPul and M.I.)
    Aimpoint PRO

    Thanks for educating me.
     
  2. fatcat4620

    fatcat4620 Member

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    CHF is what the military uses do it must be 100x better (sarc). It does make the steel harder which should maje it last longer.
     
  3. hardluk1

    hardluk1 member

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    delete...
     
  4. Mr. Farknocker

    Mr. Farknocker Member

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    You can start here to find out what forging does and the different types of forging.

    http://en.wikipedia.org/wiki/Forging

    As far as how it plays a part in the barrel, I'll let others chime in.
     
  5. USSR

    USSR Member

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    They are simply cheaper to produce than either a button rifled or especially a cut rifled barrel. The machinery to produce them is quite expensive, that is why usually only the major rifle manufacturers use them.

    Don
     
  6. SpentCasing

    SpentCasing Member

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    CHF is NOT mil-spec. Diameco (Colt Canada) it is. But not in the US. Its one of the main reasons I prefer FN CHF barrels (PSA, Spikes, Centurion, Noveske etc.) over Colt barrels for my hard use carbine.
     
  7. gbeecher

    gbeecher Member

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  8. meanmrmustard

    meanmrmustard Member

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    Also, I'd like to add, I work in a machine shop and would like to set one record straight: 4140 is not inferior to 4150 steel. You will likely never see, feel, or observe any superiority.

    4150 is a harder steel than 4140. Harder means brittle, due mainly to vanadium. This is what is used on the M4.

    4140 is not as hard, but tougher. Heat treated 4140 with kill most drill bits if you try to go through it, other than carbide. 4150 chips. 4140 is what is used for the military's SAWs.

    I prefer a 4140 CHF barrel.
     
    Last edited: Oct 25, 2012
  9. fatcat4620

    fatcat4620 Member

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    I was more referring to the saw more. I had seen a quote from a study on saw barrels putting CHF chrome and nitride lined barrels against each other. They also tested a non CHF barrel and non CHF/non chromed. The non CHF barrels dogged out early while the CHF went to like 30k (over about 6 or 8 hours with 100 belts and minimal cool down time.).
     
  10. Okiegunner

    Okiegunner Member

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    Speaking of barrels...

    Do not forget FN. There are FN made CL, 1 in 7 twist, SAW barrels, on the market now for around $200.00 a piece.

    At one time, I believe, it was only Noveske that was using the FN manufactured SAW barrel.

    The FN made barrels should be very high quality.
     
  11. Oglee

    Oglee Member

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    I hear alot of people say CFH is superior cause it lasts longer yet never once has anyone shown positive data on it.

    The only real data i have seen is the '07 dust test(which was flawed IMO) but at the end of it every rifle(3 had CHF barrels) every barrels head space exceeded safe parameters and had to be replaced. So the only real test flawed as it may have been showed no difference in barrel life.

    CHF is a much faster way to make barrels though.
     
  12. USSR

    USSR Member

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  13. MistWolf

    MistWolf Member

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    Properly made CHF barrels are very good barrels. The steel structure is denser, especially near the surface from all the pounding.

    Colt compared their standard U.S. made barrel to their Canadian CHF barrel and tests showed the CHF barrel offered no real advantage over their standard barrel.

    In either case, the cost of a replacement barrel will be a drop in the bucket compared to the cost of the ammo needed to wear it out
     
  14. Oglee

    Oglee Member

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    Do you have a link Mistwofl? I would be interested in reading that.
     
  15. Quentin

    Quentin Member

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    I have a BCM standard barrel and Daniel Defense CHF. Honestly I'm more than satisfied with both. Can't see any advantages with either but then I'm only interested in 2 MOA. I don't shoot from a bench. Bench shooting with super accurate ammo should show a difference.

    Personally I'd say the variations in individual barrels could make as much difference as the type of rifling.
     
  16. MistWolf

    MistWolf Member

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    No, it was awhile back when I read it online. I do recall it was from a reliable source. I believe it was one of the industry experts over on m4carbine.net but I am uncertain
     
  17. Oglee

    Oglee Member

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    Thanks mistwolf, with about 20 minutes of google searching I found a refference post about the subject and it looks like C4IGrant posted it.

    http://www.m4carbine.net/showthread.php?t=109165&page=3

    The refference post I found was dated 2010 so it looks like he has stated it more than once.
     
    Last edited: Oct 28, 2012
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