Polygonal rifleing

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by ROBSTER, Jan 5, 2010.

  1. ROBSTER

    ROBSTER Well-Known Member

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    Is polygonal rifling as accurate as normal rifling? I have heard that it lasts alot longer than conventional rifling. Or could you cut polygonal rifling for the first few inches and then transfer to conventional rifling to give it a longer throat but still act like a forceing cone and also get the bullet spinning/moving before contacting the rifling?lightbulb
     
  2. Mikecr

    Mikecr Well-Known Member

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    First you would need to identify the polygonal implied.
    Several barrel makers claim they are the ONLY makers of true polygonal!
    But H&K's Poly looks to me more true than claims from these others..

    I hold 2 barrels from 2 makers(Schneider, Pacnor) that are supposedly polygonal. But I tell you they are nothing more than rounded button rifling.
     

  3. ROBSTER

    ROBSTER Well-Known Member

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    I have a desert eagle with polygonal rifling and it seams very accurate so I assumed the other barrel manufactures polygonal was the same.
     
  4. LouBoyd

    LouBoyd Well-Known Member

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    Polygonal barrels have been around since the time of the Civil War. Qute a few Whitworth rifles were imported from England. They had hexagonal bores. This is a .451 Caliber. The bullet mold was shaped to match. They were among the most accurate rifles of the time both as small arms and field cannons.
    http://www.whitemuzzleloading.com/images/whiterifles/histor10.gif

    There's no magic. An accurate rifle has to spin the bullet without excessive asymmetric distortion but with minimum blowby. Can a polygonal barrel do that better then a "land and groove barrel? After 150 years it's still debatable.
     
  5. J E Custom

    J E Custom Well-Known Member

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    If done properly they should be as accurate as any system of rifling . but my concern would be the bullets.

    All of the bullet manufactures have designed there jackets around the "land and groove"system
    of rifling and they may not perform as well in something else.

    Beware of the better mouse trap ,it may only be different not better.

    If you wan't to experiment "Great" but if this is your only gun buy one with conventional rifling.

    J E CUSTOM
     
    Last edited: Jan 9, 2010