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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Why the love for MOA?
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<blockquote data-quote="sscoyote" data-source="post: 540645" data-attributes="member: 1133"><p>I also like to apply reticles for downrange zeroing and rangefinding. IMO it's a good idea to completely understand the math behind reticles in 2nd and 1st focal plane scopes, and how to apply them. </p><p></p><p>We actually measured the size of a target at 1000 yds. to within .3" once using a mil reticle at a subtension other than std. milliradian (to obtain better accuracy). We had to mil a target of known dimension at a known range to calculate the subtension ("reverse milling") then remil the 1000 yd. target to calc. it's dimension. I have done this more than once successfully. </p><p></p><p>As it turns out the most basic form of the mil-ranging formula actually defines rangefinding with any reticle (and even turret) as well as downrange zeroing with reticles and/or turrets.</p><p></p><p>It's not often discussed but i agree that a backup system should be established in case the laser doesn't work.</p><p></p><p>The more you know about your optic the better off u will be in the field.</p><p></p><p>This optic system is a perfect example of that--</p><p></p><p><img src="http://i157.photobucket.com/albums/t49/sscoyote1/007_7.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>It's the Nikon Buckmasters 6-18x mil-dot on a 17 Fireball XP-100. It has been responsible for a few 1st shot connections as far out as right around 500 yds. in some light winds on prairie dogs. I apply the optic at 18x for rangefinding and windage reference where the mil becomes 66% of the 3.6 IPHY std. mil. subtension at 12x (12/18=.667, .667x3.6=2.4 IPHY). Elevation is IPHY with turret.</p><p></p><p>It is FUN to play with the math for long-range shooting...IMO!</p></blockquote><p></p>
[QUOTE="sscoyote, post: 540645, member: 1133"] I also like to apply reticles for downrange zeroing and rangefinding. IMO it's a good idea to completely understand the math behind reticles in 2nd and 1st focal plane scopes, and how to apply them. We actually measured the size of a target at 1000 yds. to within .3" once using a mil reticle at a subtension other than std. milliradian (to obtain better accuracy). We had to mil a target of known dimension at a known range to calculate the subtension ("reverse milling") then remil the 1000 yd. target to calc. it's dimension. I have done this more than once successfully. As it turns out the most basic form of the mil-ranging formula actually defines rangefinding with any reticle (and even turret) as well as downrange zeroing with reticles and/or turrets. It's not often discussed but i agree that a backup system should be established in case the laser doesn't work. The more you know about your optic the better off u will be in the field. This optic system is a perfect example of that-- [IMG]http://i157.photobucket.com/albums/t49/sscoyote1/007_7.jpg[/IMG] It's the Nikon Buckmasters 6-18x mil-dot on a 17 Fireball XP-100. It has been responsible for a few 1st shot connections as far out as right around 500 yds. in some light winds on prairie dogs. I apply the optic at 18x for rangefinding and windage reference where the mil becomes 66% of the 3.6 IPHY std. mil. subtension at 12x (12/18=.667, .667x3.6=2.4 IPHY). Elevation is IPHY with turret. It is FUN to play with the math for long-range shooting...IMO! [/QUOTE]
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Why the love for MOA?
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