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mildot

 
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  #1  
Old 09-07-2002, 06:18 AM
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Join Date: Aug 2002
Location: SWEDEN
Posts: 6
mildot

HI !
I can not figure out how to do the range estimation with mildot reticle, if the target is 1/2 mil. Is it 0.5 or!, even on the mildotmaster its hard to maseare example a 12 inc with 1/2 mil.When i do the math and type in 0,5 its turnouts wrong, or am i do it wrong. Please help to figare this out.
Peder Johannson
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  #2  
Old 09-07-2002, 09:11 AM
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Join Date: May 2001
Posts: 2,369
Re: mildot

Peder

I'm a little confused about what you are having trouble with, is it that you can't mil at .5 accurately or that you can't use the MilDot Master at .5 accurately?

To mil accurately you need practice. .5 mil is not too difficult and can be done easily in the USMC type "dots" by mil'ing from the center crosshairs or using one of the dots as .5 the object mil'ed. There is now a Gen2 reticle available from Premier that has .5 MIL marks.

To determine distances with small mil readings use the right side (Bullet Drop) of the MilDot Master, not the left side (Target Range). Set the sliders' 12 inches mark on the "Bullet Drop" scale next to the .5 MILS mark and read the distance from the standard (left window) "Target Range" indicator. Using this method you can range to .30 MILS and 2 inch objects.
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  #3  
Old 09-07-2002, 02:02 PM
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Join Date: May 2001
Posts: 920
Re: mildot

daveosok...

Leupold doesn't use 1/4 mil USMC dots on their scopes... except the M3-LR.

The reticle for the M3-LR is made by PremierReticles for that single scope, and is on wire, with football shaped dots.

All the rest of Leupold's mildot scopes have .22 mil dots that are round, and etched on glass.

The new Gen 2 reticle from Premier has round, .20 mil dots, and is etched on glass...
... kinda keeps you on your toes, Yeah?

CatShooter.
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  #4  
Old 09-07-2002, 03:40 PM
daveosok
 
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Re: mildot

Cat
Hey bud how ya been?

You may want to check out Leupolds site about which style of Mildot they are using.
Leupold

The scope I have is their Vari - X III 6.5 - 20 X 50 mm, side focus, Long Range Target 3/4 Mildot.

The dots are oblong.

Their customer manual does not state anything about the mildot system and how to use it.
Their site is where I got the information on what style of mildot they use.
They may have changed it back when I bought my scope to a different style.
It is not etched on glass either.

Their is some conflicting information on their site however. The scope I have is a 3/4 mil, now are they talking about the distance between the edges of the dots because that is 3/4 of a mil, but the distance between center of the dots is 1 mil.
So what is my scope actually?
I would think that it is the 1 mil since the distance between centers is 1 mil but the box says 3/4 mil.
The scope number is 52199.
Date purchased 09/29/00.

[ 09-07-2002: Message edited by: daveosok ]

[ 09-07-2002: Message edited by: daveosok ]
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  #5  
Old 09-07-2002, 10:42 PM
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Join Date: Apr 2002
Location: S.W. Sask. Canada
Posts: 78
Re: mildot

To Daveosok or anyone else . Can someone explain to me what a mildot master is and how it works ? Does the 36 inch in your example equal a mildot at a 1000 yards ? When you went from 333.3 how did you change to 3.333 / .5 .
Thanks
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  #6  
Old 09-07-2002, 11:57 PM
daveosok
 
Posts: n/a
Re: mildot

This is why I hate millradians.
I haven't used the mildot master so I will only tell you how you have to do it the old fasion way.

You must first find the target size in yards which is a decimal equvilent, where yours is 12 inches compared to 36 inches.
12 / 36 = .33333333333 I rounded off to four decimal places an old machinist habit but I guess you could do three places and still be ok, however when you get out their to where these guys are shooting on this board the small stuff counts.

.3333 X 1000/number of mils taken up

.3333 X 1000 = 333.3
3.333 / .5 = 666.6

Its easy when you have a multiplier of one half. But say it was .7 mils that you had to devide by, you'd need a calculator or the mildot master. Since not everyone has a computer for a brain and field math with what equals what at certain distances can get you either right on target or your way off the bubble.

This is why I like MOA reticles, whatever it is in inches is what you use, not a fractional decimal equivilent of 36 inches.
MOA to me is much easier.

Object in size of inches / number of moa X 100
Now your saying that you have a target that is 12 inches in height. In MOA it would have a height of 11.459 moa.
Since everyone agrees that one moa is one inch @ 100 yards will will stick with the 12 inches.

1 Mil = 3.438 MOA
You have half a mil registered as your range using a target size of 12 inches.
12 / 1.719 MOA X 100 = 698 yards compared to 666 with the mil dot. (for the rest of you reading this jump in if I'm wrong and correct me!!!!)

You must be exactly correct reading the mildots or moa and since they have yet to put a mildot scope on the market that has it sectioned off from the center of the crosshairs to the first mildot where their should be 7 very small dots and the egde of the first dot indicating hundrenths of a mil or .1, between each dot their should be 6 dots.
But their isn't, unless you have one custom made say at Premier Reticles.

Since Leupold uses USMC mil dots, the dot size is actually .25 so you could use a half of the dot which would be .125 but then again 3 decimal places devided by 4 decimal places well you do the math.

I enjoy MOA a lot better and size its in inches you can guess distances of items that you know your close to say a truck tire most factory truck tires are 31 inchs tall, thats .8611 when using the mildot formula, or 31 inches using MOA.
Or you can put tha kabosh to all of this and go get a laser range finder!

A small handheld caculator or palm pilot with software either programmed in or downloaded for trajectory and click values at certain distances.

[ 09-07-2002: Message edited by: daveosok ]
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  #7  
Old 09-08-2002, 06:17 AM
Platinum Member
 
Join Date: May 2001
Posts: 2,369
Re: mildot

Willy 1

Here's the MilDot Master site
http://www.mildot.com/

It'll axplain how the MM works.



On the first post by Daveosok he's performing a conversion. Basically he's taking the 12 inches that Peder stated as an example target size and converting it to portions of a yard. 12 inches / 36 inches = .333333 He then multiplies this by 1000 to get a distance reading 333.3 (I'll return to this later.)

Then Daveokos is determining the actual target distance by dividing the .5 Mil that Peder stated as the mil reading on the target (the 12 inch example target) So the 333.3 yards (Daveosok mis-typed to 3.333) /.5 = 666.6 yards as a target distance of a 12 inch target mil'ed at .5 mil.


A mil essentially equates to 36 inches at 1000 yards (very handy for us that this 36 inches also equals 1 yard). So a reading of 1 mil on a 36inch target would put that target at 1000 yards. Daveosok converted this by determining the ratio of the 12 inch target to the 36 inch 12/36 = .3333. He then needed to get the 1000 yards back into the equation and multilpied by 1000 to get 333.3 yards. So, to this point he's determined that a 12 inch target at 1 mil is 333.3 yards away. He then takes the actual mil reading of .5 and gets the final answer of 666.6 yards.

Once you become familiar with Mil readings you'll select your own method of range determination. The MilDot Master is very easy and nearly anyone can use it well.

If you only mil a few items you can make a chart and place it on the rifle or carry a laminated chart in your pocket. for example:

18" deer (big Muley)

5 mil tall = 100 yards
4 mil tall = 125 yatds
3 mil tall = 166 yards
2.5 mil tall = 200 yards
2 mil tall = 250 yards
1.75 mil tall = 285 yards
1.5 mil tall = 333 yards
1.25 mil tall = 400 yards
1 mil tall 500 yards
.75 mil tall = 666 yards
.5 mil tall = 1000 yards

(The method I use (when I'm only mil'ing one size item's) to determine distances is similar to Daveosok's. I mentally convert the target sizes to mils then divide by the mil reading. As an example, for local deer (they're smallish) I figure 15 inches back to brisket 15/3.6 = 4.1666 (round to 4.0), this let's me know that a deer 100 yards away should be very close to 4 mils from back to brisket. Now, when I'm local hunting deer and I mil one, I can very easily determine his approximate distance with mental math. If he's 2 mils back to brisket I know he's 200 yards away (the 4 mil "standard deer at 100 yards" /2mils for the current reading = 2 * the 100 yard standard. If he's 1 mil tall, he's (4/1 = 4*100 yards standard =) 400 yards away.)
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