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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Nightforce test.
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<blockquote data-quote="Jon A" data-source="post: 592484" data-attributes="member: 319"><p>It is very common, which is one of the reasons I encourage people to measure every scope they get. Even expensive scopes, if you measure carefully enough, you will often find are not <em>exactly</em> on as many manufacturers' tolerance is in the +/- 2% range. That doesn't sound like much, but if your scope is off 2% and it takes you 25 MOA to get to 1000 yds, you'll be off by two clicks or over 5". This is where much of the "this bullet has a higher BC in this rifle than it does in that rifle" comes from.</p><p></p><p>There are plenty of ways to do it the old fashion way shooting box tests or even not shooting:</p><p></p><p><img src="http://www.jonaadland.com/Hunting/IOR/3_18_ReticlePics/ReticleCalCheck.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Either way, try to do it over 10 mils or 30+ MOA at least</p><p></p><p>As mentioned above, use of a collimator allows you to do a much more thorough evaluation of the tracking without leaving your house than most anybody will go through shooting. </p><p></p><p><img src="http://www.jonaadland.com/Hunting/Vortex/4-16X50PST/DSC00444.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://www.jonaadland.com/Hunting/Vortex/4-16X50PST/DSC00460.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>That is especially useful for identifying when the click value isn't constant throughout its range which you really need a huge box test to do while shooting. It's pretty normal for most scopes' clicks to go a bit crazy right at the end of their travel (lateral movement, dead clicks, etc) but you can find some scopes with click values that are different at different places in their usable travel (though it shouldn't happen on a quality scope).</p></blockquote><p></p>
[QUOTE="Jon A, post: 592484, member: 319"] It is very common, which is one of the reasons I encourage people to measure every scope they get. Even expensive scopes, if you measure carefully enough, you will often find are not [I]exactly[/I] on as many manufacturers' tolerance is in the +/- 2% range. That doesn't sound like much, but if your scope is off 2% and it takes you 25 MOA to get to 1000 yds, you'll be off by two clicks or over 5". This is where much of the "this bullet has a higher BC in this rifle than it does in that rifle" comes from. There are plenty of ways to do it the old fashion way shooting box tests or even not shooting: [img]http://www.jonaadland.com/Hunting/IOR/3_18_ReticlePics/ReticleCalCheck.jpg[/img] Either way, try to do it over 10 mils or 30+ MOA at least As mentioned above, use of a collimator allows you to do a much more thorough evaluation of the tracking without leaving your house than most anybody will go through shooting. [img]http://www.jonaadland.com/Hunting/Vortex/4-16X50PST/DSC00444.JPG[/img] [img]http://www.jonaadland.com/Hunting/Vortex/4-16X50PST/DSC00460.JPG[/img] That is especially useful for identifying when the click value isn't constant throughout its range which you really need a huge box test to do while shooting. It's pretty normal for most scopes' clicks to go a bit crazy right at the end of their travel (lateral movement, dead clicks, etc) but you can find some scopes with click values that are different at different places in their usable travel (though it shouldn't happen on a quality scope). [/QUOTE]
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