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  1. #11
    Senior Member
    Join Date
    Jun 2013
    Location
    Canyon Ferry, MT
    Posts
    371
    It's all about the bullet.

    There's a HUGE difference between a (308 Win) 168gr FGMM at 2650, and a hand-loaded 215 Berger at 2600.
    Shane

  2. #12
    Do you use the normal bc or the adjusted bc for the twist rate?

  3. #13
    Senior Member
    Join Date
    Jun 2013
    Location
    Canyon Ferry, MT
    Posts
    371
    I'm just using the default from the bullet library in JBM Trajectory (simplified).

    http://www.jbmballistics.com/cgi-bin...j_simp-5.1.cgi
    Last edited by MontanaMarine; 05-08-2016 at 10:42.
    Shane

  4. #14
    Quote Originally Posted by MontanaMarine View Post
    I'm just using the default from the bullet library in JBM Trajectory (simplified).

    JBM - Calculations - Trajectory (Simplified)
    Have you used this load to harvest game?


    Sent from my iPhone using Tapatalk Pro

  5. #15
    Senior Member
    Join Date
    Jun 2013
    Location
    Canyon Ferry, MT
    Posts
    371

    No I haven't. At 2600 fps MV, it's retaining 1800 fps to 800 yards though.
    Shane

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