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  #1  
Old 06-21-2022, 06:47 PM
DP68 DP68 is offline
 
Join Date: Oct 2020
Location: Atlanta, GA metro
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Default Milsurp Sights - Theory and Practice

Posting this as I think some may find it an interesting video on milsurp sights / adjustments from the Anvil crew. Starting at about the 3:50 mark is a very interesting and clever (IMO) take on calculating sight adjustment.

A couple of disclaimers as my intention is not to start a flame war about the veracity of video, I am neither promoting or voguing for the technical accuracy or mathematical correctness of this video

https://www.youtube.com/watch?v=Wjl0p4hYzFw
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  #2  
Old 06-27-2022, 01:15 PM
Bml Bml is offline
 
Join Date: Mar 2019
Location: Oregon
Posts: 494
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Pretty good video. The example and graphics of calculating sight movement was unnecessarily complicated and not clear or complete. It is much simpler using a ratio and not calling it a constant. The triangles should be overlayed so it is clear the angles match.

If you canít recall how to derive the equation, it is

Sight adjustment = (sight radius)*(impact distance from Point of aim)/36/(distance from target)

Sight adjustment, sight distance and sight radius are in inches and distance from target is in yards. 36 is the conversion of yards to inches.
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  #3  
Old 06-29-2022, 11:39 AM
meplat meplat is offline
 
Join Date: Jan 2010
Location: Prescott, AZ
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Quote:
Originally Posted by Bml View Post
Pretty good video. The example and graphics of calculating sight movement was unnecessarily complicated and not clear or complete. It is much simpler using a ratio and not calling it a constant. The triangles should be overlayed so it is clear the angles match.

If you canít recall how to derive the equation, it is

Sight adjustment = (sight radius)*(impact distance from Point of aim)/36/(distance from target)

Sight adjustment, sight distance and sight radius are in inches and distance from target is in yards. 36 is the conversion of yards to inches.
I think you mean

Sight adjustment = (sight radius)*(impact distance from Point of aim)/(36*(distance from target))

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  #4  
Old 07-01-2022, 10:01 PM
Bml Bml is offline
 
Join Date: Mar 2019
Location: Oregon
Posts: 494
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Quote:
Originally Posted by meplat View Post
I think you mean

Sight adjustment = (sight radius)*(impact distance from Point of aim)/(36*(distance from target))

I wrote it the way you type it in a calculator. Your way to write it is a more proper way but many people donít recall algebra and how to take that and enter it into a calculator.
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  #5  
Old 07-02-2022, 09:10 PM
meplat meplat is offline
 
Join Date: Jan 2010
Location: Prescott, AZ
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Quote:
Originally Posted by Bml View Post
I wrote it the way you type it in a calculator. Your way to write it is a more proper way but many people donít recall algebra and how to take that and enter it into a calculator.
I try to avoid calculators whenever and wherever possible as they don't really tell you anything.

The units on both sides of *any* equation must be equal. That's a Universal Law. It gives you an easy way to check veracity of any proposed equation. In your formula, units on both sides are not equal so it isn't really an "equation"

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  #6  
Old 07-13-2022, 12:51 PM
Bml Bml is offline
 
Join Date: Mar 2019
Location: Oregon
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Check your math and unit analysis.


Last edited by Bml; 07-13-2022 at 01:02 PM.
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