Anyone know a "reverse mil-dot formula"

[Fowlpursuit]

Got a utg 3-12x44 mil dot scope. What I'm wanting to do is make a chart of distances according to the mils a target takes up. In other words I'm using a 4" target size (width of a squirrel/height of a starling) and in 10 yrd  increments 20-100 yrds how many mills will this target measure?
Standard formula= distance unknown
My needed formula= mil-measurement unknown

[condor22]

Got a utg 3-12x44 mil dot scope. What I'm wanting to do is make a chart of distances according to the mils a target takes up. In other words I'm using a 4" target size (width of a squirrel/height of a starling) and in 10 yrd  increments 20-100 yrds how many mills will this target measure?
Standard formula= distance unknown
My needed formula= mil-measurement unknown

If you can use meters to target, calculated by known height or width of target in centimeters?

 Goes like this: 1 mil= 1cm @ 10 meters, so 1 mil = 2cm @ 20 meters, 1 mil = 5cm @ 50 meters, see the progression. Formula centimeters counted(milled) between center to center of two mildots, multiplied by 10 equals meters to target.   eXample  (target is 4 centimeters tall) you count 4 centimeters between 2 mildots on your reticle, multiply by 10, your firing solution is 40 meters range to target.

 Actually all you have to do is place a zero, beside the centimeters milled!

 You can practice in this simulation: http://www.shooterready.com/ Just be sure to use the range card calculated in meters, of course you can practice using yards, but my method only works metric. 

 The .1mil FFP scope is my favorite and what I practice with in the "Is the shooter Ready?" simulation.
 The white part of the silhouette is 101.5cm.

[Racer X]

I just did this for my browning Leverage in.177.
With AA diablo Fields I found at ten yards the gun shoots two full mil dots low . Then between 15-20 feet it begins to hit one mil dot down. At twenty five feet it begins hitting the crosshairs. Then it is centered on the crosshairs out to forty five feet. Then after that it is one mil dot down.

I set up every five feet and moved the target back and forth. Your gun pellet even the grade of the ground will change things.

[Motorhead]

A RULER viewed at 100 feet with scope at an accurate 12X will view 1 mil dot per inch.

[condor22]

A RULER viewed at 100 feet with scope at an accurate 12X will view 1 mil dot per inch.

Are you saying 1 mil = 1 inch @ 100 feet ?  Should that be the same with a 10x mil dot reticle?

[Motorhead]

A RULER viewed at 100 feet with scope at an accurate 12X will view 1 mil dot per inch.

Are you saying 1 mil = 1 inch @ 100 feet ?  Should that be the same with a 10x mil dot reticle?

Yes ... based on a scope having 10X mil-dot calibration

[Fowlpursuit]

I believe the utg operates. On a "metric" or mils system.. Vs. an MOA.. And it states mils read true at 10x... Will this ruler thing work even tho the mils are based on a metric scale?

[condor22]

I believe the utg operates. On a "metric" or mils system.. Vs. an MOA.. And it states mils read true at 10x... Will this ruler thing work even tho the mils are based on a metric scale?

 Mils are neither metric(meters) or English (yards). You can have mil or moa reticles, just for some reason scopes with  turrets mismatched to the reticle are the standard. Moa turrets with a mildot reticle, typical. You can find scopes with matched turrets and reticles.  Although it's expensive to find scopes with moa turrets matched to moa reticles they're out there.
 
Milliradians explained: http://www.firearmsadvantage.com/milliradians_explained.html  using mils and geometry you can calculate distance to an object.

BTW The hard part is converting mils to moa's to yards, although it's very very easy converting mils to meters. 

[Bullit]

Guys,
Have you tried the Chairgun Program?  It provides you an inch of drop/etc. table that is very useful. Also can be set up to run on various Magnifications, calibers,speeds, and pellet combos. 
 It splits your screen display and also provides an indicator (cool graph) for all of you Mildots.   The "Killzone" feature is very good.   Of course any of the calcs/programs have to be field verified, but good stuff to learn from.
Perhaps it'll help to visualize and make your "own" chart that you can use... most guys make one. Look at the turret, and you'll see how it adjusts @ the yardage.  The metric conversion is already done for you.  ie 3.6"@ 100yds/1.8"@50yds, etc.  It's old stuff.   
Anyway, no matter what make scope you buy, this program is worth your time. It's free and worth a few hours:
http://www.hawkeoptics.com/chairgun.html#.Ud7Ah6xBFiw

[condor22]

Guys,
Have you tried the Chairgun Program?  It provides you an inch of drop/etc. table that is very useful. Also can be set up to run on various Magnifications, calibers,speeds, and pellet combos. 
 It splits your screen display and also provides an indicator (cool graph) for all of you Mildots.   Of course any of the calcs/programs have to be field verified, but good stuff.
Perhaps it'll help to visualize and make your "own" chart that you can use... most guys make one. Look at the turret, and you'll see how it adjusts @ the yardage.  The metric conversion is already done for you.  ie 3.6"@ 100yds/1.8"@50yds, etc.  It's old stuff.   
Anyway, no matter what make scope you buy, this program is worth your time. It's free and worth a few hours:
http://www.hawkeoptics.com/chairgun.html#.Ud7Ah6xBFiw

 How can I put that computer program into my rifle scope?  Good luck doing all that math in your head while holding the sight picture in your rifle scope!

 BTW a better approach would be to use ballistic calculator app with and Iphone, least you can keep it with you where it's needed.

[Bullit]

You make your own 3x5 card "shooter card".  Most guys do it, when they get their specific rifle/bullet/pellet dialed in.  Even little circle card inserted in you're "flip up" cover, to "remind" you Dot/yardage Afield.   You'll get it.
Nothing new there.

[condor22]

 I guess it's hard to grasp new concepts, you can teach an old dog new tricks......or can you?  I memorize drop and reticle range find inside the scope. Loosing the sight picture to look at a range card, (the old way) usually gives target time to getaway as in a real world environment.  A laptop on the bench is another thing altogether! 

[Bullit]

I'm assuming that you have a very good amount of time, and understanding of your rifle/ammo combo. Before you get out there.   I'm an old hunter and FT player. 
So you're dead on right... no need to use Iphone, or whatever, once you get afield. 
 The info I give is very instructional, and easy to write down... 
LOL!  Us olders, (or Multi gun owners), don't remember everything we ONCE did...BUT give us a "hint", and
We'll surprise you!

[condor22]

I'm assuming that you have a very good amount of time, and understanding of your rifle/ammo combo. Before you get out there.   I'm an old hunter and FT player. 
So you're dead on right... no need to use Iphone, or whatever, once you get afield. 
 The info I give is very instructional, and easy to write down... 
LOL!  Us olders, (or Multi gun owners), don't remember everything we ONCE did...BUT give us a "hint", and
We'll surprise you!

Nothing you do surprises me   

[Fowlpursuit]

So there is no yard/meters difference in a mil-dot? Only the way I covert the target size either inches or meters dictates the way my target is ranged?

[condor22]

So there is no yard/meters difference in a mil-dot? Only the way I covert the target size either inches or meters dictates the way my target is ranged?

 Mildots are in miliradian, so are neither yards or meters.  The difference is in the math used to reticle range find being simple for metric or complicated for yards. Yes, using English or metric target dimension's determinds the math required.

 http://www.firearmsadvantage.com/milliradians_explained.html

[Bullit]

The Mildot system is set up for 10x magnification.  In inches, these are the center to center distances at various yardage.  We'll use a Std 3.6" disc, and view it at the ranges:
C/C Dot Size      How the Image Looks to you
100yds = 3.6"   It'll fill just 1 dot space, center to center.
 50yds = 1.8"    half the 100 yd  - so it'll take 2 dot spaces,  instead of just one space
 25yds = 0.9"    1/4 of the 100 yd  - so it'll take 4 dot spaces, instead of just one space
 10yds = 0.36"  1/10th of the 100 yd  -  It's gonna be pretty darn big to look at ! 
This will get you started, and you'll learn to interpolate the halfway stuff with practice.  Hope this helps some.

[Airgun.Sniper]

 I agree with Built and Condor. Making some useful points and pointing in the right direction.


 Jay

[Fowlpursuit]

Well obviously I'm screwing something up here. I used 5" and converted it to yards multiplied by 1000 (A)  I then took that and divided it by the number of yards I desired to shoot at. My hope was this would give me the mil-dot measurement.. Some how tho it does not work when I put my calculations to the test in the field..

[condor22]

 You lost me converting 5in to yards multiplying times 1000? I'd convert 5in to cm's which is about 12.5cm. Count cm's covered by 1 mil, place zero beside cm's milled for meters ranged to target. Choose drop hold. execute firing solution. 

 I recommend iPhone app or laser rangefinder or minimum programmable calculator.

 You could work up a standard drop chart using the mil-dots for holdover/under aimpoints with a rangefinder. Using the rangefinder first and then using aimpoints to complete your firing solution.

 IMHO you're making things way too complicated. ( for me. )  Just my 2 ¢'s

 If you can draw up a formula, I'm sure someone with mathematical skills can " HELP " as I have none?