Author Topic: Range Estimation with Mil Dot, MOA or any ol' Scale...  (Read 419 times)

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Offline flmason

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Range Estimation with Mil Dot, MOA or any ol' Scale...
« on: April 30, 2013, 07:41:09 PM »
Hi All,
   Well, sprang for a Nikon 4.5-14SF Mil Dot after all the discussions. Thanks to everyone that helped me out. :)

Came to the conclusion that all the features I wanted weren't in a scope in my budget, so this was the one I compromised on. For practical purposes out to 250 it's still over kill. Still want the features I ain't got! LOL!

So I was thinking about range estimation using mils (or any scale) and it dawned on me the easiest calculation might go this way?

            Size of target in mils (or MOA) at 100 yards / Observed mils (or MOA) * 100 = yards to target.

For example...

Assume my target is 2 mils tall at 100 yards (7.2 inches / ~7,2 MOA)

In my scope I see that it's  only 1 mil tall (or 3.6 MOA)

So's....

            (2 mils actual height / 1 mil observed height)  * 100 yrds = 200 yards to target.

   
                                            [or  (7.2 MOA / 3.6 MOA) * 100 = 200 yrds.]

Seems pretty straight forward to me.

Generically it would be...

                                          Size of target in scale units at 100 yards / Size of target in scale units observed in scope * 100 = yards to target.

All you have to know is how tall (or wide) your target is in the scale of your reticle... at 100 yards... and the world is your oyster.

Clearly this is where fine graduations, high power and FFP have plenty of applicability.

And of course "Part 2" is knowing your loading's hold over at X yards.

This scope has capped turrets... not really fully tactical or target (what'd I expect for something called "BuckMaster", LOL!) So even though it has 1/4 MOA clicks.. chances are I won't be using the W & E in that way for the most part. Would be nice to have all the knobs and such, for sure. But maybe someday. 

So it comes down to knowing your drop... which for hunting anything larger than a varmint is going to be 3" or less out to about 250 for '06 and similar... so really it's all kind of pointless.

On the other hand... my envisioned usage of the mil dots as stand in for tangent iron sight markings should work nicely. I'll just have to think in 3.6 MOA terms, or about 14.5 clicks to a dot.

Thoughts?

Is my math on?