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Thread: 1:7 v. 1:9 for 55gr/75 gr

  1. #31
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    Molon, your posts are a breath of fresh air.

    It is exaperating to continually see the same level of misinformation re light bullets in fast twists over and over despite posts like yours.

  2. #32
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    Thanks Molon for the great post, it definitely cleared up my questions on the matter. Just goes to show that we can read and speculate all we want but rounds down range matter most.

  3. #33
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    "Shooting uphill in the rain", is that anything like walking to school in the snow? Uphill both ways? lol, I joke, but that second group is just awesome. The other guys are right, people can say whatever they want, the proof is in the pictures. Thanks

  4. #34
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    so much for 1:9" not being able to hit anything with 75gr+, despite what the internet says. Not optimal but not the end of the world like a lot of people try to make it out to be.
    Last edited by ForTehNguyen; 09-14-10 at 13:29.

  5. #35
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    Quote Originally Posted by NavArch View Post
    OK. I've got it that my 1:9 upper needs to be replaced by a 1:7 upper or be re-barreled if I want to move from 55 grain bullets to 75/77 grain bullets.

    Here's the question: Once I do that, how accurate will I be shooting 55 grain bullets in the 1:7 barrel at 200-300 yds? I have what I will call "an adequate supply" of 55 gr ammo, and am not going to be able to completely swap it out really easily. Do I need two complete uppers in order to make the best use of my ammo supply?

    Thanks.

    My 1/7 twist Noveske shoots 52 to 55 grain ammo just fine. It also shoots 77 grain loads great too.




    In fact my 1/7 twist Noveske shoots ball better than my 1/8 twist Larue. It also shoots better than the Laure with 52 grain match bullets. The Larue however kicks its but with 77 and 75 grain bullets.





    Last edited by Alaskapopo; 09-14-10 at 13:40.
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  6. #36
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    I am pretty sure that if you look at many posts here (and I think Molon will agree) that it is not 100% across the board.

    Yes, some or even many will. But, it is not always the case and you may be the lucky guy who gets the one that doesn't. I an addition most 1/9" are not HP/MPI tested.

    Quote Originally Posted by ForTehNguyen View Post
    so much for 1:9" not being able to hit anything with 75gr+, despite what the internet says. Not optimal but not the end of the world like a lot of people try to make it out to be.



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  7. #37
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    Quote Originally Posted by Iraqgunz View Post
    I am pretty sure that if you look at many posts here (and I think Molon will agree) that it is not 100% across the board.

    Yes, some or even many will. But, it is not always the case and you may be the lucky guy who gets the one that doesn't. I an addition most 1/9" are not HP/MPI tested.
    Absolutely and I clearly stated that while I haven't measured the exact twist of the "1:9" inch twist barrel that I fired the 75 grain OTM load from, that it is quite possible that the twist of that barrel is on the "tighter" side of 1:9". Also keep in mind that those groups were fired in a Michigan summer. The results might have been entirely different in a Michigan winter. I would not "bank" on a 1:9" twist barrel adequately stabilizing the 75-77 grain bullets.

    Here's a pic of the Hornady 75 grain A-MAX fired from another 1:9" twist barrel at a distance of only 25 yards.

    Last edited by Molon; 09-14-10 at 15:33.
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  8. #38
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    Quote Originally Posted by MustangGreg66 View Post
    "Shooting uphill in the rain", is that anything like walking to school in the snow?
    With no shoes on!
    Last edited by Molon; 09-14-10 at 14:47.
    All that is necessary for trolls to flourish, is for good men to do nothing.

  9. #39
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    Quote Originally Posted by Iraqgunz View Post
    I an addition most 1/9" are not HP/MPI tested.
    So true, this has been what led me to get rid of my 1/9 upper I put on my Franken AR before I joined this site and became better educated. As you stated IG there are exceptions, as there is with most things in life.

  10. #40
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    Glad to hear I'm not the only one saying SBR's can be accurate much further out than most people think.

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