140 grn 7mm berger. do i use G1 or G7 ?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by jorvin, May 13, 2010.

  1. jorvin

    jorvin Well-Known Member

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    what is better to use for berger bullets. the G1 BC or the G7. what are you guy/gal using? from what i have read it looks like the G7 is more accurate???????
     
  2. BryanLitz

    BryanLitz <b>Official LRH Sponsor</b>

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    The G7 BC is more appropriate for VLD's and most BT bullets.

    Just make sure you set the ballistics program to G7. If you give it a G7 BC and the program is set to G1, the results will be meaningless.

    Take care,
    -Bryan
     

  3. J E Custom

    J E Custom Well-Known Member

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    The G7 method is based on a model that is closer to the modern bullet shape and therefore
    will be more accurate if you calculate trajectories before you shoot.

    If you do the range testing you will find the G7 will be closer to your range results. The only issue
    with the G7 method it that the Ballistic Coefficient will be Much lower than the G1 BCs and that is
    why bullet makers use the G1 method (Higher BC numbers sell bullets)

    I recently did a test to determine BCs (Am going to post the results soon) of a fine bullet and
    the G1 BC was .637 and the G7 BCs were .308 so you can see why they like the G1 method.

    If the numbers don't worry you then go with the G7 method and you will be happier with the
    results.

    J E CUSTOM
     
  4. jorvin

    jorvin Well-Known Member

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    May 13, 2009
    right on guy's . i'm not looking for hype. i'm looking for true numbers. i will be using the g7 berger balistic program numbers. thanks again and i do shoot better because i use berger!!!!