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The Basics, Starting Out
Rapid-Z® Ballistic Reticles
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<blockquote data-quote="sscoyote" data-source="post: 357410" data-attributes="member: 1133"><p>I use many different ballistic and rangefinding reticles for downrange zeroing and rangefinding. Any 2nd focal plane reticle (like the Zeiss and Burris ballistic reticles) can be used at different powers and consequently different subtensions. But if your 1st or 2nd stadia is zeroed at 400 yds. at one power it will change it's zero at a different power. The only zero that remains the same is the one that's located at the optical center (center x-hair) of the scope. That's the whole basis behind the 2nd FP system Zeiss uses--subtension is roughly inversely proportional to magnification, and is the same with any reticle located in the 2nd FP.</p></blockquote><p></p>
[QUOTE="sscoyote, post: 357410, member: 1133"] I use many different ballistic and rangefinding reticles for downrange zeroing and rangefinding. Any 2nd focal plane reticle (like the Zeiss and Burris ballistic reticles) can be used at different powers and consequently different subtensions. But if your 1st or 2nd stadia is zeroed at 400 yds. at one power it will change it's zero at a different power. The only zero that remains the same is the one that's located at the optical center (center x-hair) of the scope. That's the whole basis behind the 2nd FP system Zeiss uses--subtension is roughly inversely proportional to magnification, and is the same with any reticle located in the 2nd FP. [/QUOTE]
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Rapid-Z® Ballistic Reticles
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