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Long Range Hunting & Shooting
First Focal Plane Vs. Second Focal Plane
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<blockquote data-quote="orkan" data-source="post: 773909" data-attributes="member: 25377"><p>I encourage you to test that extensively when your scope arrives. </p><p></p><p>Most optics <strong>actual</strong> magnification does not precisely match the indications printed on the ring. Some not even close. So you must "calibrate" the magnification ring to the reticle. Here's an article that describes the process. (one method anyway)</p><p></p><p><a href="http://www.arcanamavens.com/LBSFiles/Shooting/Downloads/ScopeChecking/" target="_blank">How to Optically Check a Rifle Scope</a></p><p></p><p>Last time I did this test, we did it on a nightforce, leupold, vortex, bushnell, and a few other scopes. NONE lined up where they said they would be. Even those that did, the numbers had no "tick" marks to line up perfectly. As Broz pointed out, nightforce has a little "tick" line that lines up with their indicator at half power. Yet I would be very surprised if those are dead on either. The one we tested wasn't.</p><p></p><p>The best way to do it is to calibrate it, and put precise markings with little needle scratches. Then, if you confirm them to be correct, engrave them. Once it's calibrated, it's set for good. (provided the optic is quality and the reticle isn't moving around inside the erector) </p><p></p><p>EDIT: See this is what I'm talking about. Why wouldn't they design that reticle so that the holds continue down the entire stadia? Why stop it at 10 moa and go to a big thick black line? They could give you a lot more holds in that FFP to equal the holds you'd have available in the SFP if they just built the reticle differently.</p></blockquote><p></p>
[QUOTE="orkan, post: 773909, member: 25377"] I encourage you to test that extensively when your scope arrives. Most optics [B]actual[/B] magnification does not precisely match the indications printed on the ring. Some not even close. So you must "calibrate" the magnification ring to the reticle. Here's an article that describes the process. (one method anyway) [URL="http://www.arcanamavens.com/LBSFiles/Shooting/Downloads/ScopeChecking/"]How to Optically Check a Rifle Scope[/URL] Last time I did this test, we did it on a nightforce, leupold, vortex, bushnell, and a few other scopes. NONE lined up where they said they would be. Even those that did, the numbers had no "tick" marks to line up perfectly. As Broz pointed out, nightforce has a little "tick" line that lines up with their indicator at half power. Yet I would be very surprised if those are dead on either. The one we tested wasn't. The best way to do it is to calibrate it, and put precise markings with little needle scratches. Then, if you confirm them to be correct, engrave them. Once it's calibrated, it's set for good. (provided the optic is quality and the reticle isn't moving around inside the erector) EDIT: See this is what I'm talking about. Why wouldn't they design that reticle so that the holds continue down the entire stadia? Why stop it at 10 moa and go to a big thick black line? They could give you a lot more holds in that FFP to equal the holds you'd have available in the SFP if they just built the reticle differently. [/QUOTE]
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First Focal Plane Vs. Second Focal Plane
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