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57K

XDTalk 2K Member, from Heart of Texas

57K was last seen:
Oct 22, 2014 at 7:52 PM
    1. taylorjr
      taylorjr
      It was a close one for sure! Surprised for sure that Hunnicutt missed that chip shot.
    2. 57K
      57K
      Polygonal rifling includes Hexagonal and Octaganol as well. Geometric shapes with equal dimension sides. Sice it's cut through a bore, instead of typical lands and grooves you get part/half ovals rather than square cut lands and grooves. It will not seal lead bullets as well because conventional square cut lands and grooves actually "bite" down on the lead forcing a better seal. With polygonal rifling, a bullet may not completely seal to the bore and allows super-heated gasses to escape from the base of the bullet around its sides, melting lead that adhere's to the bore, i.e., leading.

      Polygonal rifling is much better used with jacketed bullets. As far as claims of superior accuracy, that doesn't really hold up. Custom Match Grade barrel makers use conventional square cut rifling for a reason, not polygonal rifling. A lot of shooters just don't understand that its main purpose for use is lower manufacturing costs. Hope that helps.
    3. StealthOPS32
      StealthOPS32
      Hey man how's it going? I read your reply on the "Question about HK Polymer Handguns." I was wondering if you can explain to me the differences in barrel rifling, and what the problem is with polygonal rifling. I really don't know much about it, but I am just curious to learn. Thanks in advance.
      -Stealth
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    Home Page:
    http://www.kevinlynntheauthor.com
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    Heart of Texas
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    "It might be the devil, or it may be the LORD, but you're gonna have to serve somebody!" Bob Dylan


    The truth about OSS data and wound ballistics:http://arxiv.org/ftp/physics/papers/0701/0701268.pdf

    Get the complete picture here: http://www.btgresearch.org/wb.htm
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