/ Register

no chrono

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by retiredcpo, Mar 11, 2010.

  1. Mar 11, 2010 #1
    retiredcpo

    retiredcpo Well-Known Member

    Messages:
    579
    Joined:
    Jul 19, 2009
    ok Im fairly new to this
    is there a way I can figure my approx velocity with out a chronograph
    Im shooting a 7mm rem mag with a 160 accubond over 62 gr of RL22 winchester mag primers and case
    thanks
    retiredcpo
     
  2. Mar 11, 2010 #2
    Moman

    Moman Well-Known Member

    Messages:
    827
    Joined:
    Feb 7, 2008
    Some of the load programs that members are using can apparently get it pretty close. Do you use Exbal? If so, you can test your drops at various ranges and validate the trajectory. This will adjust your velocity.
     
  3. Mar 11, 2010 #3
    retiredcpo

    retiredcpo Well-Known Member

    Messages:
    579
    Joined:
    Jul 19, 2009
    nope no exbal not even sure what that is
     
  4. Mar 11, 2010 #4
    J E Custom

    J E Custom Well-Known Member

    Messages:
    8,135
    Joined:
    Jul 29, 2004
    The way most do it is to shoot at 100yards,200yards,300yards,400yards and 500yards
    using the same point of aim and then compare the drop to ballistic chart for that brand
    and weight of bullet.

    And if you can check it at longer distance it will help to get a more true velocity.

    It is not as good as a chronagraph but it will get you close.

    J E CUSTOM
     
  5. Mar 12, 2010 #5
    Buffalobob

    Buffalobob Well-Known Member

    Messages:
    5,095
    Joined:
    Jun 12, 2001
    Send me a PM with your email address in it and I will send you a sheet of instructions on how to do it.

    Jim