i have never did the equation for wind freehand...just with exbal...can someone give me a equation to figure out wind, given i know the windspeed?
bench
bench
Advanced Marksmanship reading wind?
- Thread starter benchmstr
- Start date
Re: reading wind?
Different calibers will differ. Even the same caliber out of different guns or with different velocities, bullets or loads will all be different. What are you shooting?
Different calibers will differ. Even the same caliber out of different guns or with different velocities, bullets or loads will all be different. What are you shooting?
Re: reading wind?
as of right now i am just practicing on this game.
http://www.shooterready.com/lrsdemo.html
bench
as of right now i am just practicing on this game.
http://www.shooterready.com/lrsdemo.html
bench
Re: reading wind?
Here's a pretty simple formula I use for fast calculations:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" ><pre>
(range in yards/100) * wind (mph)
wind hold(mils) = ----------------------------------
constant
</pre></div></div>
The constants I use are:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" ><pre>
Range(yards) Constant
<= 500 45
600 43
700 41
800 39
900 38
1000 37
</pre></div></div>
However, that's a rough approximation for my load. If you want one more accurate, use a ballistic program set up for your load and a 1 mph full-value crosswind, and work the formula backwards:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" ><pre>
(range in yards/100) * wind (mph)
constant = ----------------------------------
wind hold(mils)
</pre></div></div>
But you can use a ballistics program and Excel to build a windcard like this one, which you can quickly use in the field to calculate the effects of varying wind - the wind holds are in mils:
Here's a pretty simple formula I use for fast calculations:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" ><pre>
(range in yards/100) * wind (mph)
wind hold(mils) = ----------------------------------
constant
</pre></div></div>
The constants I use are:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" ><pre>
Range(yards) Constant
<= 500 45
600 43
700 41
800 39
900 38
1000 37
</pre></div></div>
However, that's a rough approximation for my load. If you want one more accurate, use a ballistic program set up for your load and a 1 mph full-value crosswind, and work the formula backwards:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" ><pre>
(range in yards/100) * wind (mph)
constant = ----------------------------------
wind hold(mils)
</pre></div></div>
But you can use a ballistics program and Excel to build a windcard like this one, which you can quickly use in the field to calculate the effects of varying wind - the wind holds are in mils:
Re: reading wind?
Good to combine the equations too bench. Lindy has the best shorthand equation for mil hold. Don't get confused by a few other equations out there just because you see the constants are different. Be sure to look for the conversion you are wanting...MOA or Mil. With A LOT of practice, you will get fairly consistent at calling wind without Exbal. Not to say you won't want to pull your hair after a miss, but you will at least be able to learn from it. LOL Good luck.
Good to combine the equations too bench. Lindy has the best shorthand equation for mil hold. Don't get confused by a few other equations out there just because you see the constants are different. Be sure to look for the conversion you are wanting...MOA or Mil. With A LOT of practice, you will get fairly consistent at calling wind without Exbal. Not to say you won't want to pull your hair after a miss, but you will at least be able to learn from it. LOL Good luck.
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