help with mil dot zero

[remingtonman_25_06]

I cant figure out how to come up with the zero's for mil dots.

I am using a sightron 3-9x mil dot on my 243 w/55g nbt's at 3750fps. 250 yard zero.

I just wanna general idea of where the mills will be on at.

Thanks.

 

[Bigwheels]

Google JBM Ballistics. It will lead you to a free site that can do everything you would ever need for external calculations.

 

[YoteSmoker]

I'm pretty sure 25-06 Man is familiar with external ballistics and long range shooting....The Mil-Dot reticle is actually primarily intended for ranging animals to an approximation of yards using calculations between the hashmarks and division to come up with a close approximation vs using a range finder. You may want to check into getting a "Mil-Dot Master". It is a cardboard slide card that uses a chart to come up with the calculations for you. As far as using it as a bullet drop compensator or windage compensator, it would require actual range shooting to determine where it will hit and also you would need to have the magnification at a specific power, normally the highest power, as a general rule of thumb...hope this helps a little.

 

[Antelope_Sniper]

Here's what you do:
Go to JBM Ballistics and enter your load data.
Choose a read out in inches, and Mils.
1 mil = 3.6 inches per 100 yards,

So, at each range, multiply the drop in mils, by the range in 100's of yards. At the ranges where this can be evenly divided by a number of mils, you will be on for that number of dots, assuming your crosshairs are zeroed at 100 yards. From there, you can do all kind of cool things, you just have to play with the math.

I used this method before I switched over to target knobs.

 

[remingtonman_25_06]

mil dots aren't my fancy. I hate math.

Dialing is so much easier.......but the sightron dont have target knobs so I'd like to use the mil dots as aiming points, or at least gimme a general idea so I know where to hold if a coyote is standing out there 500-600 yards.

I went to a different site where I use to know how to work it out, but that site is no longer available.

I realize field shooting is the only way to get the true data, I just wanted a ballpark number to get me started.

I also dont wanna zero at 100 yards, I wanna zero for 250, that way my MPBR is better.

I'll be using a rangefinder to confirm range. I'm not wanting to figure out range by useing them dots, once again HATE MATH!!!

Pretty much just want to set it at 9x and use it as a BDC. 4 dots means 4 different ranges it can be on from whatever zero you have set at.

I'll play with that JBM and see what I come up with and run it by here and see what you guys think.

 

[corbin9191]

If u give me all of the atmospheric data and the characteristics of the load that you have I will run it through my exbal and let you know what distance each mildot is

 

[remingtonman_25_06]

I got exbal to, how are you doing it??

I cant figure it out.

Load is as follows

243 win
55g NBT
3750fps
22" bbl
750' ASL
250 yard zero
1.5" sight height

Dont know what else you would need. If I missed something, lemme know.

 

[remingtonman_25_06]

OAL is 2.665"

 

[corbin9191]

When you start exbal up go to program options, then right at the bottom of the list you will find an option that says Ballistic Reticle Analysis, then go to Point blank data table (2nd from the top), Then it will tell you what bar is for what distance.

 

[Bigwheels]

I realise that remingtonman is an experienced shooter. I was pointing out that he can use JBM to give him precise MIL holds for his particular set up. He could then do like I did, & make a drawing of the mil reticle, & mark the hold overs on it, & paste it on his stock, or inside his scope cap. It is very accurate if the info input is accurate. I have my holds glued inside my scope cap, so when I open it all my holds out to 500 yds are right there in front of me.

 

[jmad_81]

Bud next time we are out shooting I'll help ya with that. I LOVE DOTS!!!! Bring a computer generated drop sheet. We'll check it to make sure it is right, if not we will make the adjusments. Once you get that figured out you only have to do the math once. Write the hold points down just like you would for your MOA adjustments and your good to go blast some yotes! Its pretty easy and once you get it dial and practice using it, it can be faster than using targer knobs..