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ZeroPak Delta


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Type: Posts; User: grandpamac

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    Greetings, My Speer No 9 manual lists the Ruger...

    Greetings,
    My Speer No 9 manual lists the Ruger 77 .243 twist at 1 in 10" which it may be in a 40 year old rifle. Barrel twists have tightened over the years with some now as fast as 1 in 8" so...
  2. Replies
    8
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    510

    Best check the rifling twist requirements of the...

    Best check the rifling twist requirements of the projectile and your barrel twist. I suspect they may not be stable.
    GPM.
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