unstable 308

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by canjaeger, Feb 15, 2004.

  1. canjaeger

    canjaeger Active Member

    Messages:
    25
    Joined:
    Feb 15, 2004
    What do you think ? i am trying to develop a long range practice round useing a hornady 150 grn fmj useing wc 845 powder in my rem.vls .started with 39.5 grn pwdr.col. max for magazine 2.8 @100,200,300 meters great i achieve .75 mol accuracy but yesterday pushed it to 400 and iwas keyholeing the target bullet had lost stability what could be the culprit? oh by the way in the lee book the velocity is around 2500 fts using h335 data which was recomended by retailer and by the looks of the primer i am nowhere neer max preasure
    thanks jaeger [​IMG]
     
  2. deergrunt

    deergrunt Well-Known Member

    Messages:
    90
    Joined:
    Feb 19, 2003
    I practice with what I intend to hunt with. My 308 likes the 168 grain Hornady A-max. I use 45 grains of H-Varget in Winchester brass in front of CCI bench rest primers. My barrel has a 1:12 twist and is 26 inches long. Give this load a try and see if you still have the same problem. I hope this helps. Good luck.
     

  3. Michael Eichele

    Michael Eichele Well-Known Member

    Messages:
    3,829
    Joined:
    Jan 6, 2003
    What is your twist and velocity??

    Sounds like you might need a 155 Palma or AMAX.
     
  4. canjaeger

    canjaeger Active Member

    Messages:
    25
    Joined:
    Feb 15, 2004
    My velocity is aprox. 2500fts as for i don't have a chronograph my twist rate is 1 in 12 thanks guys [​IMG]
    jaeger
     
  5. Michael Eichele

    Michael Eichele Well-Known Member

    Messages:
    3,829
    Joined:
    Jan 6, 2003
    2500 FPS in 12x should work ok. Try the 155 Palma or Lapua Scenars and that will probably pix ya up.