Conversion Formula

[fonzy]

Hi guys, I could use some help on the math for scopes.

What I mean is figuring out your drop in moa and in mils. I have tried to Strelok and Nikon Spot On. While it does tell you your moa and your mils needed it doesn't say how they got there.

I googled and got just the basics http://www.mil-dot.com/media/1027/th..._equations.pdf.

http://www.youtube.com/watch?v=VA2PZBD5Tjg

But my math doesn't come out right. It comes out close but not dead on as to what the programs say.

Does anyone have any tricks of a fast formula to find you mils and moa. Also how to convert from one to another.

I'm also trying to figure out on a regular mildot reticule what each dot represents as far as yardage. I'm failing.

For example on a .223 @ 400 yards it has 16.3 inch drop.

Now what do I do? Thanks for the help.

[PrimaryArms]

About 3.9moa is your 400 yard hold or adjustment.

If your shooting an AR or any 5.56mm including some .223 check out the ACSS system It will do all the work for you from ranging,bdc,wind and even leads.



Dimitri

Here you go
1.047 x yardage = MOA
Example 1.047x4 for 400 = 4.188= moa at 400

[fonzy]

1 moa=4.188 @ 400yds

16.3 divided by 4.188 equals 3.89 moa.

Ok I'm with you. Now how to convert to mils? 3.89 moa divided by 1mil(3.438)=1.13 mils correct?

[PrimaryArms]

1 moa=4.188 @ 400yds

16.3 divided by 4.188 equals 3.89 moa.

I rounded the 3.89 to 3.9 you shoud round to a 4 moa adjustment

Dimitri

[PrimaryArms]

1 moa=4.188 @ 400yds

16.3 divided by 4.188 equals 3.89 moa.

Ok I'm with you. Now how to convert to mils? 3.89 moa divided by 1mil(3.438)=1.13 mils correct?

Yes

Now be sure to learn how to read wind and adjust. BDC is easy its the wind that will blow you away



Dimitri

[fonzy]

How do I figure out what each mildot represents? The program shows the 2nd mildot down from the crosshair being at 400 yrds. I just can't figure out how they came up with that.

Thanks Dimitri for your help.

[PrimaryArms]

For 400 using .223 you should be at around 5-6 Moa or about 2 mil

Maybe you have the BC wrong

What round are you using and out of what gun.

Dimitri

[fonzy]

I appologize. I got the programs mixed up and was looking at the wrong one. Strelok shows the 2nd mil dot at 476 yrds.

At 476 yards I drop 33.43 inches. 6.71 moa and1.95 mils.

This is where I have the most trouble converting it to a mildot reference point.

[fonzy]

I'm guessing I round up the 1.95 mils to 2 mils hence the 2 mildots???
I just don't know

[PrimaryArms]

You can make it mil or moa I believe there is an option somewhere but your data seems really off!

What ammo and what rifle are you using?


Dimitri

[fonzy]

AR15 zeroed at 25 yds.
223 cartridge 55 grains 3165 speed .250 bc.

[fonzy]

Thanks for all your help Dimitri, I greatly appreciate it. Thank you and have a good night.

[PrimaryArms]

AR15 zeroed at 25 yds.
223 cartridge 55 grains 3165 speed .250 bc.

You will not get 3165 out of a 16"
3060 is more like it if your using M193 if your using .223 it will be much slower.

Also why are you zero at 25? If your scoped dial in at 100.

Dimitri