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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
NP-R2 Range Estimation
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<blockquote data-quote="Luke Mason" data-source="post: 15424" data-attributes="member: 912"><p>Brent, </p><p>Thanks for explaining your NP-R2 in detail. I also appreciate the open mind. I hope this explains it well for you.</p><p>Here is a basic idea of how I use my scope. As I mentioned, I am using a NXS, mine is in 3.5x15x50 w/mil dot reticle. As you're aware, the dot represents .25mil, with half dot representing .125</p><p>I too find the divisions difficult to work with, even though I have used this type of reticle for some time. Based on the .25 mil dot, the space between the inside edges of the dots represent .75</p><p>Most guys will then visually divide the .75 into 6 even increments of .125 -The .75 added to each half dot of .125 equals the total 1.0 mil</p><p>The problem I have, is the difficulty in quickly attaining the smaller increments as I had discussed with you previously, e.g. when you have a reading that is in the middle of a perceived division…5.5,6.5, etc. In the case of the .125 increments, the midway reading between your visual mark would give you a number like .0625 - This added to the whole of .125, gives you .1875 - This to me is not fast or easy to work with; like your Dad, making the smaller readings is not happening. </p><p></p><p>This is what I do. I totally disregard the fact that the dot is .125, and treat it like it is .1 - I then treat the .75 spacing as if it where .8 - By doing this, I divide the inside .75 spacing into 8 divisions. To get the 10th reading that I am looking for, I add the halves of each dot on each side. Center of dot to center of dot is 1.mil regardless of how I mentally chop it. Breaking down the center .75 spacing into 8, I get 8 divisions of .0937, rounding to .094 – This is very close to the .1 value.</p><p></p><p>Here is a breakdown taking the .75 space and dividing into 8ths equaling (.094) each. I add them along the way to show the progression as if you where reading your reticle. The first measurement starts from the inside edge of the dot. Take any of these numbers along the way, and add it to your half dot of .125 – If you have a full mil, you will be starting from the center of a dot to get the remaining measurement. This would be your base to start from where you know that regardless of anything that you are doing, the measurement is a full 1. mil. Your answer will be within a few hundredths.</p><p></p><p> Divided actual increments - .094 - .188 - .282 - .376 - .47 - .564 - .658 - .752 </p><p> Shooters used increments - .1 .2 .3 .4 .5 .6 .7 .8</p><p> Adjusted w/+ .125 half dot - .219 .313 .407 .501 .595 .689 .783 .877</p><p> Shooters total reading - .2 .3 .4 .5 .6 .7 .8 .9</p><p></p><p>The bottom row represents the measurement from the center of the dot out to your divisions, adding along the way to show the reading.</p><p></p><p>Here is a working example: 30" target – (30" x 27.77 = constant of 833.1)</p><p></p><p>Shooters method: Mil reading 1.1 833.1 ¸ 1.1 = 757 yds</p><p>School house method: Mil reading 1.125 833.1 ¸ 1.125 = 741 yds</p><p>Difference = 18yds</p><p></p><p>Shooters method: Mil reading .9 833.1 ¸ .9 = 926yds</p><p>School house method: Mil reading .875 833.1 ¸ .875 = 952yds</p><p>Difference = 26yds</p><p></p><p>Let me know if you have any questions. I have more to tell you however, I have to get some sleep (work in 6hrs).</p><p>Luke</p></blockquote><p></p>
[QUOTE="Luke Mason, post: 15424, member: 912"] Brent, Thanks for explaining your NP-R2 in detail. I also appreciate the open mind. I hope this explains it well for you. Here is a basic idea of how I use my scope. As I mentioned, I am using a NXS, mine is in 3.5x15x50 w/mil dot reticle. As you’re aware, the dot represents .25mil, with half dot representing .125 I too find the divisions difficult to work with, even though I have used this type of reticle for some time. Based on the .25 mil dot, the space between the inside edges of the dots represent .75 Most guys will then visually divide the .75 into 6 even increments of .125 -The .75 added to each half dot of .125 equals the total 1.0 mil The problem I have, is the difficulty in quickly attaining the smaller increments as I had discussed with you previously, e.g. when you have a reading that is in the middle of a perceived division…5.5,6.5, etc. In the case of the .125 increments, the midway reading between your visual mark would give you a number like .0625 - This added to the whole of .125, gives you .1875 - This to me is not fast or easy to work with; like your Dad, making the smaller readings is not happening. This is what I do. I totally disregard the fact that the dot is .125, and treat it like it is .1 - I then treat the .75 spacing as if it where .8 - By doing this, I divide the inside .75 spacing into 8 divisions. To get the 10th reading that I am looking for, I add the halves of each dot on each side. Center of dot to center of dot is 1.mil regardless of how I mentally chop it. Breaking down the center .75 spacing into 8, I get 8 divisions of .0937, rounding to .094 – This is very close to the .1 value. Here is a breakdown taking the .75 space and dividing into 8ths equaling (.094) each. I add them along the way to show the progression as if you where reading your reticle. The first measurement starts from the inside edge of the dot. Take any of these numbers along the way, and add it to your half dot of .125 – If you have a full mil, you will be starting from the center of a dot to get the remaining measurement. This would be your base to start from where you know that regardless of anything that you are doing, the measurement is a full 1. mil. Your answer will be within a few hundredths. Divided actual increments - .094 - .188 - .282 - .376 - .47 - .564 - .658 - .752 Shooters used increments - .1 .2 .3 .4 .5 .6 .7 .8 Adjusted w/+ .125 half dot - .219 .313 .407 .501 .595 .689 .783 .877 Shooters total reading - .2 .3 .4 .5 .6 .7 .8 .9 The bottom row represents the measurement from the center of the dot out to your divisions, adding along the way to show the reading. Here is a working example: 30” target – (30” x 27.77 = constant of 833.1) Shooters method: Mil reading 1.1 833.1 ¸ 1.1 = 757 yds School house method: Mil reading 1.125 833.1 ¸ 1.125 = 741 yds Difference = 18yds Shooters method: Mil reading .9 833.1 ¸ .9 = 926yds School house method: Mil reading .875 833.1 ¸ .875 = 952yds Difference = 26yds Let me know if you have any questions. I have more to tell you however, I have to get some sleep (work in 6hrs). Luke [/QUOTE]
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