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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Leupold Reticle Subtension
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<blockquote data-quote="sscoyote" data-source="post: 170757" data-attributes="member: 1133"><p>I also apply the plex reticle for rangefinding, and the system i use is based on the mil-dot mil-ranging formula. Just substitute the plex subtension where the milliradian subtension is, and use it the same way the mil-dot is used. This is what i refer to as the modified mil-ranging formula.</p><p></p><p>I looked up the reticle subtensions for the new VX-III 6.5-20X, and they are 8.5 and 2.8 inch per hundred yds. plex post tip to post tip respectively. Of course the 20X subtension is too narrow to use for big game, but the 6.5 would work well enuf. Using say 25 inches for back to brisket bull maybe here's the ranging chart--</p><p></p><p>25 x 100 / 8.5 / 1.0 = 300 yds. (bull brackets the plex post tip to plex post tip 100% or 1.0 of a "subtension unit")</p><p></p><p>294 / 0.9 = 325</p><p></p><p>294 / 0.8 = 370</p><p></p><p>294 / 0.7 = 420</p><p></p><p>294 / .6 = 490</p><p></p><p>294 / .5 (x-hair) = 590</p><p></p><p>Here's the range sticker--</p><p></p><p>6X-1.0-300</p><p>.9-325</p><p>.8-370</p><p></p><p>etc. to as far out as u feel comfortable using it.</p></blockquote><p></p>
[QUOTE="sscoyote, post: 170757, member: 1133"] I also apply the plex reticle for rangefinding, and the system i use is based on the mil-dot mil-ranging formula. Just substitute the plex subtension where the milliradian subtension is, and use it the same way the mil-dot is used. This is what i refer to as the modified mil-ranging formula. I looked up the reticle subtensions for the new VX-III 6.5-20X, and they are 8.5 and 2.8 inch per hundred yds. plex post tip to post tip respectively. Of course the 20X subtension is too narrow to use for big game, but the 6.5 would work well enuf. Using say 25 inches for back to brisket bull maybe here's the ranging chart-- 25 x 100 / 8.5 / 1.0 = 300 yds. (bull brackets the plex post tip to plex post tip 100% or 1.0 of a "subtension unit") 294 / 0.9 = 325 294 / 0.8 = 370 294 / 0.7 = 420 294 / .6 = 490 294 / .5 (x-hair) = 590 Here's the range sticker-- 6X-1.0-300 .9-325 .8-370 etc. to as far out as u feel comfortable using it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Leupold Reticle Subtension
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