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Super Sniper/Mil Dot Newbie Question

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/25/2006 at 20:09
ozzy1038 View Drop Down
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Pardon me for my ignorance, but are the mil dots on the SS 16X spaced properly (3.6) for ranging?  Or do I need to multiply my distance by 1.6?  I was practicing on the shooter ready site, and learned that if I ranged in 20X as opposed to 10X that I would have to take my distance times two, to get an accurate estimation.  

 

As an example, lets say I was ranging something that is 20" tall that covered 2.3 mil through a 10X scope.

20"  x  27.8 / 2.3mil = 241yds     

 

If I do the exact same thing at say 20X this is what I get

20"  x  27.8 / 4.6mil = 120.86 x 2 = 241yds

 

So since most mil dot scopes are meant to range at 10X will I need to multiply by 1.6 to get the right distance, since my SS is 16X.  Or is it dead on?

 

I hope this was clear.  Thanks in advance for all your help.

 

 

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/25/2006 at 22:34
Mike McDonald View Drop Down
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On a fixed magnification scope the mil reticle will be columnated for ther power of the scope.

Regarding mildots and second focal plain variable scopes;

If you have not had the scope calibrated (columnated) for the reticle installed, then it's frankly best guess whether
the reticle is "on" at any setting.  What is meant by this is an optics company, generally the manufacturer, will take YOUR specific scope, put in on an optical culumnaotr and determine EXACTLY where the reticle subtends to its desired dinention, and then mark the power setting ring to designate that you need to range at this particular setting to have error free ranging with that particular reticle in that particular scope.  For example, your 6.5-20x scope with second plane reticle should range at 20x but in reality may need to be set to 19.4x to properly dinension the reticle to target image size.
So,
Taking your second plane 6.5-20x scope to 10x would not guarantee that you would simply need to double your mil reading to get a correct range.

See what happens when you ask tech questions so late in the evening ? 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/26/2006 at 06:26
ozzy1038 View Drop Down
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Thanks.  I guess I'll find out when I take it to the range. It's just that it is on a .50 BMG, and the less wasted shots the better.   Although I guess I could set a target of known size at a known distance and see.

 

 



Edited by ozzy1038
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/26/2006 at 12:27
cheaptrick View Drop Down
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Excellent post, MM.

Very informative, as usual.

 

Welocme to The OT, Ozzy!!!!



Edited by cheaptrick
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/27/2006 at 09:39
Chris Farris View Drop Down
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All the SS scopes have properly calibrated mil-dot reticles.

 

Check out this post:

 

What power is your mil-dot reticle used?

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/03/2006 at 22:11
Garrand View Drop Down
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You guys are amazing. I keep getting more good info here.

Thanks for being here !
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/04/2006 at 00:00
sscoyote View Drop Down
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gotta love that mil-ranging formula-- really simply a geometric formula that defines the relationship between 2 points at 1 distance relative to 2 points at another distance. Understanding this concept opens up a world of flexibilty for "mil-ranging" that has, in fact, a significance much larger than the mil-dot itself, in that it's easy to see that it can be used for any "reticle" really (plex, ballistic, custom, 2nd focal plane mil-dots at other than the milliradian calibrated magnfication, archery sight pins, etc., etc.) That 27.8 factor is simply the subtension of that particular reticle divided into the range at which the subtension was measured (100/3.6 = 27.8). Just punch your plex reticle subtension into the equation, and then start using it as a "3-stadia mil-dot" for ranging with a surprising degree of accuracy. It really is a fun concept to play with that's rarely investigated.

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