A Bit of Info: Mil Dots on Ncstar Tactical 3-9x42 Scope

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Here's an email I sent with the response regarding power settings for mil dot use on the Ncstar's tactical 3-9x42 scope. Figure I'd post it since I did a search and couldn't find it. Hopefully it helps someone


I was just curious what power setting I need to use while calculating range with my 3-9x42 mark III tactical mil dot scope. I didn't see anything in the manual or any specific markings on the scope. I assumed the 9 power but don't really have anything to compare it to to confirm it.




Hi this is Rich from the Tech Support Dept.
The #STM3942G Mil-Dot reticle is calibrated to the ~7¼ magnification.
You can verify your scopes calibration the next time you are at the range. Take a measured target to the range and verify what power zoom setting your scope should be for proper range estimation.
Follow the example below to find out the actual power zoom setting.
• An 18” target at 100 Yards should be about 5 Mils. 2½ Mils at 200 Yards.
Item #
Magnification
STM3942G
7¼


Thank you, Rich.


18031 Cortney Ct.
City of Industry, CA 91748
NcSTAR New Patriot Series
Richard Thomas
NcSTAR - Tech Support
866-627-8278 (Toll Free) Ext 303
626-575-2478 (Fax)
[email protected]
 
Thats funny its not even a magnification thats marked on the optic, you just have to guesstimate your at 7 and quarter haha. I'm not knocking the optic (I happily own one) it just seems like they didnt expect anyone to actually use the mil-dots for range finding so they don't have any published info on it.
 
Scuds03 said:
Thats funny its not even a magnification thats marked on the optic, you just have to guesstimate your at 7 and quarter haha. I'm not knocking the optic (I happily own one) it just seems like they didnt expect anyone to actually use the mil-dots for range finding so they don't have any published info on it.
Click to expand...

haha yeah that's kind of what I was thinking. Thought it was a little strange that they give you a little sheet on how to use mil dots but leave out the most important part when it actually comes to using it :rolleyes: Time to whip out the paint pen

Rustpot - thanks for the link. I actually read it last night trying to find something on magnification. I've got the basics, but that link has some good info on more advance uses as well.
 
if you're having problems finding 7.5 i read on opticstalk earlier you can just take a target out to 100 yards and mark every 3.6 inches with solid lines on your target, and adjust until your mildots are lined up perfectly with all the lines.

I still haven't seen anyone post a picture of ncstar's mildot, their stock pictures look very strange and nothing like it should- if someone could post a through scope picture of the mildot it would be greatly appreciated!
 
Slider_ said:
Rustpot - thanks for the link. I actually read it last night trying to find something on magnification. I've got the basics, but that link has some good info on more advance uses as well.
Click to expand...

That site has a TON more articles besides the one I linked to. There's one on variable power scopes I found after I posted.
 
grimreaper21 said:
if you're having problems finding 7.5 i read on opticstalk earlier you can just take a target out to 100 yards and mark every 3.6 inches with solid lines on your target, and adjust until your mildots are lined up perfectly with all the lines.

I still haven't seen anyone post a picture of ncstar's mildot, their stock pictures look very strange and nothing like it should- if someone could post a through scope picture of the mildot it would be greatly appreciated!
Click to expand...


I haven't even gotten out to zero it in yet. It's been raining for the past few days. I'll give you're method a try though just to make sure.

Here're some shots of the actual mil dot. None illuminated, red, and green. And no, the crosshair isn't canted

IMG_0563.jpg

IMG_0566.jpg

IMG_0565.jpg
 
Might as well have the blue reticle up as well. Just got the scope in the mail today. Picture taken at lowest power setting.
 

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A mil is technically 1/6400 of a circle but in practical on the ground, no trigonometry "rule of thumb" terminology is simply 1 at 1000. 1 meter at 1000 meters. 1 inch at 1000 inches. 0.001:1 ratio. (Note to college math majors: Don't knock yourself out proving or disproving this, it's a rule of thumb. Close enough!)

Do the math and you'll see that 3.6" at 100 yards (3600") is 1 mil (and 18" is 5 mils). Both are easy to remember and measure.

Don't confuse a mil with a MOA (minute of angle) which is a rule of thumb defined as 1" at 100 yards.

-- Chuck
 
ahh good post thanks guys. I'm no expert but do those look "math official" mil sizes? it looks more to me like it is just modeled after it in appearance. if that is the case the 3.6'' @ 100 yd trick might not exactly work. I thought they looked a little more like this
03.JPG
 
Last edited:
You're right. They don't really look "math official". Looks like everything is a little fatter all the way around. Although the dots do look relatively proportional to the picture that you posted. Only one way to find out I suppose
 
The distance between the dot centers is 1 mil on a standard mil dot scope. The dot itself is 1/4 mil diameter. At 1000 yards there's 36" between the dot centers (remember, it was 3.6" at 100).

mil-dot_reticle.gif


-- Chuck
 
do you think that applies to this ncstar reticle? it looks a little off to me, all the mil dots seemed smashed in a tiny little area instead of spread out on the reticle. it looks more like a plain duplex with dots added.
Leupold-Fine-Duplex-Reticle.gif
 
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