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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
35 mm tube IOR's
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<blockquote data-quote="Guns &amp; Glass" data-source="post: 17301" data-attributes="member: 1718"><p><strong>Re: 35 mm tube IOR\'s</strong></p><p></p><p>Night Force are set at the 1st Focal Plane, either 15X, or 22X.</p><p></p><p>You CAN easily use any other power, but the factoring changes, is still as accurate, but like any other scope maker will require some calculations.</p><p></p><p>22X is used on all 22X, 32X, or 42X because many long range shooter find it the easiest to use.</p><p></p><p>All ranging optics must use a preset power to range, and some can also be used as a BDC.</p><p>It isn't possible to range at one power, the use the BDC at another for accuracy.</p><p></p><p>The Mil Dot in a 5.5-22X56 at 22X give you exactly the dimensional-calibrations of MOA.</p><p>Plus once you've ranged the target, you have exactly the BDC set at MOA also. No fooling around with dials, etc.</p><p></p><p>Let me give another example using Brents R2.</p><p>Set at 22X, the distance between the vertical hash marks is exactly 2 MOA @ 100 yds.</p><p>Sat a deer was ranged covering 3 marks. Since the average deer is 18" from bottom chest to top of the back., we can now easily figure the range.</p><p>3 (marks) X 2 MOA = 6 MOA.</p><p>Divide the target size (18) by 6 = 300 yds.</p><p></p><p>To factor any other power ranges simply divide or multiply. </p><p></p><p>I'm quite familiar with many reticule systems, but personally find the RR, and R2 to be the best. No other system is that easy, and accurate.</p></blockquote><p></p>
[QUOTE="Guns & Glass, post: 17301, member: 1718"] [b]Re: 35 mm tube IOR\'s[/b] Night Force are set at the 1st Focal Plane, either 15X, or 22X. You CAN easily use any other power, but the factoring changes, is still as accurate, but like any other scope maker will require some calculations. 22X is used on all 22X, 32X, or 42X because many long range shooter find it the easiest to use. All ranging optics must use a preset power to range, and some can also be used as a BDC. It isn't possible to range at one power, the use the BDC at another for accuracy. The Mil Dot in a 5.5-22X56 at 22X give you exactly the dimensional-calibrations of MOA. Plus once you've ranged the target, you have exactly the BDC set at MOA also. No fooling around with dials, etc. Let me give another example using Brents R2. Set at 22X, the distance between the vertical hash marks is exactly 2 MOA @ 100 yds. Sat a deer was ranged covering 3 marks. Since the average deer is 18" from bottom chest to top of the back., we can now easily figure the range. 3 (marks) X 2 MOA = 6 MOA. Divide the target size (18) by 6 = 300 yds. To factor any other power ranges simply divide or multiply. I'm quite familiar with many reticule systems, but personally find the RR, and R2 to be the best. No other system is that easy, and accurate. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
35 mm tube IOR's
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