Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Alpine Gunworks


User Tag List

Results 1 to 15 of 49
Like Tree55Likes

Thread: Large MV variation from trueing

Threaded View

  1. #11
    Member
    Join Date
    Dec 2020
    Location
    Murchison
    Posts
    64
    @stagstalker

    It could be a number of things. Apologies for the following repeats but I will just cover off the troubleshooting checklist I was taught:

    1. Incorrect range (measured or inputed)
    2. Incorrect density altitude,
    3. Incorrect spotting / poor grouping / not enough rounds to accurately determine mean point of impact
    4. Inclination angle not a 0 degrees in "target" setting
    5. Incorrect zero (including zero range wrong in Kestrel) (also make sure your units of measurement are correct for everything - I bounce between imperial and metric for different things)
    6. Wind not set to zero in Kestrel
    7. AJ not factored in
    8. Direction of flight not inputed (this is more pertinent for CAL DSF)
    9. Poor initial BC (not really a big concern as the CAL MV and CAL DSF process fixes this)
    10. Incorrect bore height

    Could be a couple other curly factors like barrel degrading BC more than normal or faulty scope but the issue is most likely one of the ten factors above. I recommend going through your "TGT", "Wind", "Gun" and "Enviro" menus and ensure that none of the ten points above are affecting your CAL MV. If no faults are found, I would redo your CAL MV, use the 0.293 G7 and do it out at Mach 1.2 which I am guessing will around 900m for you - pending DA. Flick me a call if you are still getting an abnormal result. I'll PM you my phone number.

    Cheers,

    JT
    Moa Hunter, Stocky and stagstalker like this.

 

 

Similar Threads

  1. Minor cartridge weight variation question
    By Woody in forum Reloading and Ballistics
    Replies: 8
    Last Post: 17-07-2020, 11:24 AM
  2. Headspace variation after sizing
    By YosemiteSam in forum Reloading and Ballistics
    Replies: 14
    Last Post: 04-06-2018, 10:24 PM
  3. 123gr A-max Variation in ogive to base length
    By GWH in forum Reloading and Ballistics
    Replies: 16
    Last Post: 28-08-2014, 06:20 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!