1-7 twist too much ????

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Freedom2live, Jun 10, 2013.

  1. Freedom2live

    Freedom2live Banned

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    Hello there folks, my question is am getting a new custom barrel for my ruger m77 243.. I am shooting 105 bergers and A-max.. I changed my mind for 1-8 to 1-7, I think it would stabilize that bullet better than 1-8. I dont think I am over revving that round. ... what you folks think ???
     
  2. J E Custom

    J E Custom Well-Known Member

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    In my opinion a 1 in 8 or 1 in 9 would be better.

    The really fast twist barrels are hard on bullets (They have to start very fast and can engrave
    poorly). if you want to end up with a very fast twist rate you might look into a gain twist barrel.

    For accuracy most bench rest shooters go with a slower twist to get cleaner engraving of the bullet.

    If you were shooting something very slow like a subsonic the 1 in 7 would work.

    Most of the 223 rem shooters tried the 1 in 7 and even the 1 in 6 and went back to 1 in 8 for the best accuracy.

    Just my opinion

    J E CUSTOM
     

  3. Freedom2live

    Freedom2live Banned

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    Grain twist barrel, whats that ?
     
  4. Freedom2live

    Freedom2live Banned

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    Also I have a 1-9 twist and it wont stabilize berger 105 nor amax..
     
  5. Beluebow

    Beluebow Well-Known Member

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    IMHO 1-8 is plenty of twist for the 105's.May even work with the 115's depending on temp and barrel.
     
  6. roninflag

    roninflag Well-Known Member

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    my brother got a 1-7.5 twist . only 80% of the bullets reached the target. 6mm-284.
     
  7. Freedom2live

    Freedom2live Banned

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    So your brother 1-7.5 is not working ??
     
  8. roninflag

    roninflag Well-Known Member

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    no, it is working . just not up to his expectation, with 80% or so of the bullets actually reaching the target. the problem is he spent around 4000 for the rifle and his expectation was that 100 % would hit the target ( kind of like parachutes , you want them close to 100% reliabilty). interestingly my 1-12 twist 243 shoots awesome.
     
  9. Freedom2live

    Freedom2live Banned

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    Ron what bullet grain you used
     
  10. roninflag

    roninflag Well-Known Member

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    mostly 87 horn bthp, and 88 berger. some 70 balistic tip . a few 68's.
     
  11. Freedom2live

    Freedom2live Banned

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    Yeah light bullets work great with 1-12
     
  12. roninflag

    roninflag Well-Known Member

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    light bullets- i shot the 1-12 .243 in my first ever 1000 yard match. i used a mixture of the the 87 horn and the 88 berger. i was shoooting against a bunch of guys that had shot before. it included one shooting 107s in a 243 , another shooting 80s in 223. scores were 264, 57 and 19 repectively ( 300 possible) . i guess it depends on what you are shooting at . i consider them "just right" for what i shoot at with that rifle..
     
  13. Rocky Mountain

    Rocky Mountain Well-Known Member

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    1-7 twist is really only needed for the very heavy weight bullets, this fast a twist can be hard on jackets making it hard to find the rite bullet and load
     
  14. Freedom2live

    Freedom2live Banned

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    My gunsmith at hart barrel says its optimum twist because my 243 aint shootin past 3000fps. There therefore its going around 2856 fps.. it makes sense, also I read about how crapy made bullets will disintegrate with shit bullets. . I ll give it a try.. good shooting at 1000