Need to rebarrel an old FNH Sporter .220 Swift

Discussion in 'Gunsmithing' started by APynckel, Oct 12, 2017.

  1. APynckel

    APynckel Member

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    The Woodlands Tx
    Who should I go to to order a barrel for this rifle?
     


  2. Kosh75287

    Kosh75287 Member

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    Nemo
    MY initial thought would be to call Shilen, in Ennis, Tx. They're due north of you on I-45, so if you have reason to visit the D/FW MetroMESS, they're on the way. The turn-around COULD be shorter from out-of-state suppliers, but you'd certainly lose the logistical convenience.

    Point of curiosity: The original .220 Swift barrels had a gradual twist compared to other cartridges, to optimize for the lighter projectiles. Are you contemplating a faster twist, to stabilize heavier bullets?
     
  3. APynckel

    APynckel Member

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    How bout that. I had no idea Shilen was based in Ennis. I go up to dfw often. Though I'd probably just order something unless it really needs to be stupid custom.

    No. I want to stay true to the lighter faster barrel-burning rounds. 40-50gr
     
  4. Kosh75287

    Kosh75287 Member

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    Nemo
    I might be tempted to optimize for something slightly heavier, though not WAY heavier. I can understand the wish to keep it as it came to you, though. I have 87 .220 Swift cases, in unknown condition. If you'd like them, they could be had for somewhat less than what I'm seeing them priced at the usual places.
     
  5. APynckel

    APynckel Member

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    I had like 400 cases sent to me by someone off the AR15 forums and I have since annealed them all. I'm good in the brass department, but thank you.
     
  6. APynckel

    APynckel Member

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    Putting load data through the noggin, I might be persuaded to load some 55gr Vmax's in it. But I still think those fall into the standard twist rate for the rifle.
     
  7. Kosh75287

    Kosh75287 Member

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    Nemo
    There's another consideration about using the heavier projectiles. Barrel life is a function of the inverse square of the average velocity of the projectiles run through it. If you shoot all your ammo at 4000 f/s and the barrel lasts, let's say, 1000 rounds, if you were to run the same projectiles through the barrel at 2000 f/s, the barrel would last for about 4000 rounds. If you use heavier projectiles that have a muzzle velocity of 3600 f/s, the barrel would last for about 23% more rounds.

    I have NO idea of what the actual barrel life for a .220 Swift is. I just used the numbers above to illustrate what I'm saying.
     
  8. APynckel

    APynckel Member

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    Yes, I know how "barrel burners" burn their barrels. I'd just rather keep the gun within the confines of its original intent.
     
  9. Kosh75287

    Kosh75287 Member

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    Nemo
    And there's not a thing wrong with THAT, either.
     

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