Nosler Ballistic Tip true BC

Discussion in 'ELR, Ballistics & Bullets Board' started by x_wolf, Oct 3, 2017.

  1. x_wolf

    x_wolf

    Joined:
    Mar 26, 2015
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    Hi guys,
    I'm desperately searching for true/tested BC of Nosler's 7mm Ballistic Tip 140gr.
    Does anybody know something?

    Any info will be very appreciated.

    Thx.
     
  2. JEFFPPC

    JEFFPPC

    Joined:
    Jun 16, 2010
    Messages:
    163
    Shoot your load over a chronograph, zero at 100yds, shoot at 500yds. Put results into a ballistics program and play with the BC until your drop matches. I would think this would give a close true answer, at least for practical purposes.
     
  3. x_wolf

    x_wolf

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    Not a problem to do it, but I won't make it until Sunday... And I need the number sooner.
     
  4. Berger.Fan222

    Berger.Fan222

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    As far as I know no one other than Nosler has published a BC for that bullet. But most independent sources that measure ballistic tip BCs come in at 5-10% lower than the Nosler BC, which is 0.485 in this case. 0.437 would be a pretty good guesstimate in the absence of additional information.
     
  5. x_wolf

    x_wolf

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    Many thanks. Any info helps.
     
  6. x_wolf

    x_wolf

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    Range results: Norma factory ammo with Nosler Ballistic Tip 140gr, I've measured two 5-shot groups with my LabRadar. Both have averaged 2740fps out of 25,6" barrel (650mm). Norma states 2820fps on the box. I shot both groups at 330 yds, drop has matched the Kestrel calculations with BC G1= 0.485. Later I've shot at up 650yds, the drop was again matching the calculation. Conditions on range were at 720ft level and 57°F. I can only confirm the advertised BC G1= 0.485. The drop and the accuracy are more than enough for my hunting purposes.

    WP_20171006_15_42_52_Pro.jpg
     
    dmoran likes this.
  7. johnfred1965

    johnfred1965 Silver $$ Contributor

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    Applied Ballistics solver library lists the 140 ballistic silvertip(same bullet with black coaating) at .417 G1 and .213 G7
     

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