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Site for questions on rifle twist

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  • Site for questions on rifle twist

    Every now and then we have topics about what twist is best for particular bullets.
    I was looking at JBM Ballastics and they have a section on bullets and twists, which twist the bullet will be unstable, marginally unstable and stable.
    Might be helpful.

    http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi
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  • #2
    I keep this one in my favorites list:

    http://www.cbal.eu/stab.php

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    • #3
      I find Berger's very useful, the bullet library is helpful too. http://www.bergerbullets.com/twist-rate-calculator/
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      • #4
        Pretty good on the cbal. I use the Berger library quite a bit. One more tool.
        Apparently not too many handloaders are not aware of these tools that we can use.
        "The United States Marine Corps is a drug and I am a recovering addict."

        "American by birthright… U.S. MARINE by the Grace of GOD!"

        "And on the 8th day God created Marines and like fish, we came from the sea!"

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        • #5
          Originally posted by DesertMarine View Post
          Pretty good on the cbal. I use the Berger library quite a bit. One more tool.
          Apparently not too many handloaders are not aware of these tools that we can use.
          People just don't think to look DM.

          Over on SGW just 2 days ago a guy was wondering (among .410 plans involving his 8-yr-old) about recoil comparison between typical 1/2 ounce lead 1200fps load and a 3/8-oz 1400fps steel load someone mentioned.

          Heck, why wonder,,,, a dozen Recoil Calculator's are but a google or bing away here on Algore's Internet.

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          • #6
            +1 for the Berger library.

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            • #7
              This is an excellent site for twist and bullet drag calculations.

              http://www.geoffrey-kolbe.com/external_ballistics.htm

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