Twist rate?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by cmfic1, Jan 14, 2007.

  1. cmfic1

    cmfic1 Member

    Messages:
    11
    Joined:
    Oct 25, 2006
    Hey guys/gals, I am wanting to build a .280 A.I. & was wondering what would be the optimum twist rate? I will likely for the most part be loading 140gr. bullets.

    Thanx.
     
  2. Wild_Bill

    Wild_Bill Well-Known Member

    Messages:
    744
    Joined:
    Sep 15, 2005
    Hi get a 1 in 9 twist barrel it will stabalise projectiles up to the 175gr Sierra's and 180gr Bergers. I believe you will find a projectile like the 175gr Sierra best for long range shooting you should be able to get above 2800fps in a 26" barrel with it and that will be supersonic past 1200 yards.

    Cheers Bill
    Australia