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Old August 10, 2012, 04:50 PM   #1
Join Date: July 29, 2012
Location: Lubbock, Texas
Posts: 35
Range Estimating with a Mil-dot scope

Hey guys, I have a question. I am just learning about how to use a mil-dot scope. I have a 3-9 X 42 Sightmark scope. My question is what magnification do you use to estimate range?

This is the formula listed in the owners manual for the scope.

Target size (in yds) x 1000/Mils
read = yds to target

Doesn't the "Mils read" change with changes in magnification?

Thanks for your help!
hammer58 is offline  
Old August 11, 2012, 02:05 AM   #2
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Join Date: January 26, 2009
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On an FFP you can do it at any magnification, on an SFP it is usually at the max power. It should say in the manual.
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Old August 11, 2012, 09:59 AM   #3
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Location: Wyoming
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First you need to check with the manafactor to see if your scope has its reticle on the first or second focal plane.

Or look through the scope while changing magnification.

A first focal plane reticle will zoom in size with the image when changing magnification.

A second focal plane redicle remains a constant size when changing magnification.

If you scope has its reticle at the first focal plane, the calibration is valid at any magnificatin. If your scope is calibrated an the second focal plane, then its calibrated at the highest magnification.
Kraig Stuart
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Old August 11, 2012, 05:44 PM   #4
Join Date: July 29, 2012
Location: Lubbock, Texas
Posts: 35

Thanks guys, that answers my question! The reticle doesn't change when I change magnification so it must be a SFP. I bought it used at a pawn shop so I didn't get any info with it. I got the users manual online but it didn't explain this detail.

Anyway, thanks for your help!
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Old August 11, 2012, 08:08 PM   #5
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Mil-dots save time.

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