243 AI twist rates

Discussion in 'Reloading' started by Pete L, Dec 16, 2006.

  1. Pete L

    Pete L Well-Known Member

    Feb 7, 2006
    I use mainly 68 and 70 grain bullets what would the best twist rate be for this ?? may lasy barrel was 1 in 13 my new barrel should hacve been a 1 in 12 but the smith that ordered it has totally messed it up and even sent the wrong contour as well as a 1 in 10 twist,anyway Iam now informed that the company whos barrel iam having only does a 8 9 or 10 twist,will I be OK with a 10 twist
  2. StevenD

    StevenD Member

    Dec 16, 2006
    You should be. Don't know if you are shooting Berger's or not, but their recommendation for 6mm 68 and 70 gn Match Bullets is 1:13. http://www.bergerbullets.com. I have a 1:10 Hart on my 6mm TCU rifle and it does great with 68 gn Berger bullets.

  3. Centre Punch

    Centre Punch Well-Known Member

    Oct 29, 2004
    My 243 Rem had a 1-9 1/4 twist and shot 68grn Bergers and 70 SMKs extremely well so i think a 1-10 will be okay.
    However you should always go for the minimum twist that will stabilize your chosen bullet and Bergers recommendation
    is worth taking note of.