Bullet weight for barrel twist- 7mm

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by CLICKBANGBANG, Dec 6, 2010.

  1. CLICKBANGBANG

    CLICKBANGBANG Well-Known Member

    Messages:
    52
    Joined:
    Nov 24, 2010
    I have a 7mm Rem Mag with a barrel twist at 1 in 9.5. What is the ideal weight for this twist? I have AR-15s in 1-7, 1-8, and 1-9 and have all of them figured out. Lots of good info out about for ARs and barrel twist. But I have never heard much about larger cals particularly 7mm RM.

    As always, thanks for any help. :)
     
  2. elkaholic

    elkaholic Well-Known Member

    Messages:
    5,285
    Joined:
    Dec 4, 2008
    It actually boils down to length of the bullet and not necessarily the weight. I would google twist rate charts. There is some good data out there to determine twist rates. It is also determined somewhat by velocity. Higher velocity means less twist rate (to a lesser degree). Generally speaking, I am guessing around 160 grains.........Rich