accuracy load .264 win imp suggestion

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by frankg, Sep 12, 2003.

  1. frankg

    frankg Well-Known Member

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    Nov 25, 2001
    I'm going to slow down my win mag and see if I can get some better results. I believe the rule of thumb is about 3000fps for accuracy. I am currently running 3250fps with 71gr 4831sc and a 140 A-max. Does anybody have a ballpark figure to get me in the 2900 range for a starting point?
    Thanks
     

  2. DANTEC

    DANTEC Well-Known Member

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    Jul 6, 2002
    I use a 264 WIN wilcat ( 6.5/300 DTC Yuma ) wich is 264 WIN made from 300 WIN MAG to get long neck and chamber have a paralel throat , that the same capacity as the 264 WIN

    Vita N160 can deliver "light load" under 3000 fps with 54 to 56 gr you are you below 3000 fps with 142 SMK molyand use only regular primer as 210 or 210 M and not 215

    DON T TRY TO MAKE REDUCED LOA WITH POWDER SLOWER THAN 4350 BURNING RATE YOU RISQ SEE ( secondary effect explosion )

    3000 fps is just a myth of bench rest shooter I have small 6.5 ( as 6.5/22.250 ) wich is deadly accurate at 2600 fps and my 6.5/300 Yuma full load is very nice at 3300 fps in a 31 inch barrel
    velocity is not the rule , just make Ladder test to tune your load , if you plan to shoot below 3000 fps , 6.5/06 or better 6.5/270 can easy do that for less money

    good shooting

    DAN TEC
     

  3. frankg

    frankg Well-Known Member

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    Nov 25, 2001
    Secondary effect explosion sounds really bad. What is it?
     
  4. DANTEC

    DANTEC Well-Known Member

    Messages:
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    Joined:
    Jul 6, 2002
    SEE is an very unknow effect in internal balistic , the result is just gun explosion , for unclear or unknow reason powder doesn t burn but burst and destroy the rifle and in most case kill the shooter

    this phenomen appear when you try to use reduce charge of slow to very slow powder in big volume case .

    SO CAUTION when you try to develop light load in big water capacity case

    good shooting

    DAN TEC