20 inch barrel

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by curry792, Jun 9, 2009.

  1. curry792

    curry792 Active Member

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    i want to build a 500 to 600 yard target/whitetail rifle with 18 to 20 inch barrel.is this possible and what is good caliber.
     
  2. steve smith

    steve smith Well-Known Member

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    My thinking is along the lines of a 260rem, 7mm-08, or 308win.

    Those cartridges will probably preform the best in a shorter (18"-20") barrel.
     

  3. curry792

    curry792 Active Member

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    how would 300wsm do with 20 inch barrel
     
  4. zuba

    zuba Well-Known Member

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    good enough for 600 yards. I shoot a 7wsm and I'm getting almost 2900 fps out of a 17.5 inch pistol barrel with a 168 smk and 4831sc. do some reading inthe specialty pistol section... my buddy is planning a 300wsm pistol with a 18 inch barrel
     
  5. zuba

    zuba Well-Known Member

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    I almost forgot, my pistol shoots half min groups out to 600 so far
     
  6. J E Custom

    J E Custom Well-Known Member

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    +1 The 260 and the 7/08 will have better ballistics in a 20" because of bullet weight and
    BC.

    J E CUSTOM
     
  7. curry792

    curry792 Active Member

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    so .260 would be about my best bet?
     
  8. zuba

    zuba Well-Known Member

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    don't overlook the wsm's. im getting better velocities than 7-08 rifle with 10'' less barrel. with a good brake you'll have almost no recoil...
     
  9. curry792

    curry792 Active Member

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    also would 1-9 twist be best
     
  10. curry792

    curry792 Active Member

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    zuba what brake you use on wsm
     
  11. AJ Peacock

    AJ Peacock Well-Known Member

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    +1 WSM's. With a 20" barrel, you should be able to get 2950fps or better with a 165gr bullet. Very impressive for a short rifle.

    I'm thinking of building one myself. I'm contemplating the Ultimate folding sniper stock. This would make it short enough to drop in a backpack.


    AJ
     
  12. zuba

    zuba Well-Known Member

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    I've got a holland QD, but his radial brake is great... the gun comes strait back, wiith barely any muzzle rise.
     
  13. J E Custom

    J E Custom Well-Known Member

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    In my opinion Yes.

    Nothing wrong with the 7 WSM except you will have to have a magnum bolt face and
    they are notorious for feeding problems unless you install a center feed mag box. and
    you will need a muzzle break if the barrel is light.

    Don't get me wrong I have built many 7 WSMs and I own one myself and did a lot of testing
    on barrel length. starting with a 26" and cutting 1" at a time off found that 23" was the
    minimum without losing to much velocity. Keep in mind that it is the ballistic equal of the
    7mm Rem Mag and needs 70+grs of slow powder to be at 98 to 100% powder density and
    with a short barrel it produces a big muzzle flash.

    The 260 and the 7/08 works well with less than 50grs of powder and for what you want to
    do the 120 gr bullet will produce 3150 ft/sec with 45 grs of Varget with very mild recoil with
    no brake.also it has a standard bolt face.

    The 243,260,7/08 and the 308s are trouble free and very accurate and based on what you
    said about expense and difficulty in getting components I based my opinion on that information.

    There is nothing wrong with other calibers mentioned but for short barrels 18"to 22" the 308
    based cartridges work very well. And being a NATO round 308 brass should be readily available
    and can be necked down to 7/08 or 260 easy.

    The choice is yours and the more opinions the better.

    J E CUSTOM
     
    Last edited: Jun 11, 2009
  14. curry792

    curry792 Active Member

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    you think 7wsm would be better than 300wsm