Chili656

Private
Minuteman
Dec 27, 2020
7
3
Texas
Hello all,

I have created these dope card for my mk12 and my m4a1 w/an LPVO. I hope you find them useful. The purpose of these charts, in tactical theory, is to increase first-round hit probability against targets (uncertainty variables of range and wind adjusted). Then the user will adjust the point of aim based on bullet impact. It has been my experience that one should be able to effectively hit targets out to the furthest ranges if one can see the impact, within 25-40 seconds (timeline: contact, ranging (reticle or laser), wind estimation, solution referenced from the card, first-round impact, then subsequent shots until defeat. If you're good at impact identification, you should be able to hit targets within 3-4 shots on average. Please, tape them to your buttstock for practical application.

Note, you will need to tailor them to your individual suppressor POI shifts.

Conditions: Standard day temperature & pressure/50% humidity/sea level elevation. 2.685in HOB. 200m zero.

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clcustom1911

"Cartman 1-2, come in"
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  • Oct 23, 2017
    8,367
    21,286
    The River in Arizona
    When you say "standard day temperature and pressure"... what are those two measurements you used for the calculations?

    "Standard" can be anywhere from 50f to 90f and baro could be 27.8 to 30 inHg depending on where you are in the country.
     

    Qazwsx

    Private
    Full Member
    Minuteman
    Feb 19, 2017
    351
    205
    USA
    On dope sheets it’s helpful to have one row shaded and the next white background to help you read straight across. I’d also leave off the inches and feet plus round the mils to the tenth.
    Good effort I’m sure folks will find them useful
     
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    Chili656

    Private
    Minuteman
    Dec 27, 2020
    7
    3
    Texas
    On dope sheets it’s helpful to have one row shaded and the next white background to help you read straight across. I’d also leave off the inches and feet plus round the mils to the tenth.
    Good effort I’m sure folks will find them useful
    When you say "standard day temperature and pressure"... what are those two measurements you used for the calculations?

    "Standard" can be anywhere from 50f to 90f and baro could be 27.8 to 30 inHg depending on where you are in the country.

    International Standard Atmosphere (ISA), also known as the ICAO Standard Atmosphere defines a “Standard Day” as 59F, 29.92in Hg, 60% humidify, at sea level. I, however, used 50% humidity as that is what the ballistic calculator recommended as a reference point.
     
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    Chili656

    Private
    Minuteman
    Dec 27, 2020
    7
    3
    Texas
    On dope sheets it’s helpful to have one row shaded and the next white background to help you read straight across. I’d also leave off the inches and feet plus round the mils to the tenth.
    Good effort I’m sure folks will find them useful
    IMHO, including both holdover in in/ft and mils has two advantages. (1) the ability to hold over if primary optics goes down - transition irons sights, (2) ability to hold over if my LPVO is stuck on its lowest setting (reading reticle is increasingly difficult). Now, how effective one is at actually using the in/ft holdover is another question, especially with iron sights at 300-400m.

    You make a good point though. Any extra information included on this graph can serve to “distract” the shooting in stressful/time-crunched situations.

    Also, the alternating colors per range is good feedback. Perhaps it is a function vs fashion dilemma. I love the consistency of the black but it may prove to be less effective.