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The Range
Rifle & Shotgun Discussion
Zero a rifle for 100 with only a 30 yard range?
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<blockquote data-quote="doctorjj" data-source="post: 1363178" data-attributes="member: 7292"><p>I just ran Bulletflight and to zero at 100 with a 1.5" sight height, you'd need to be 0.7 inches low at 30 yards. A better zero might be 200 and for that you'd need to be 0.5 inches low at 30 yards. That's with an 80 gr bullet.</p><p></p><p>For a 100 gr Core-Lokt, you'd need to be 0.6 low for 100 yard zero and 0.1 inch low for a 20 yard zero.</p><p></p><p>I also ran various temperatures, pressures and humidities and non of that changed anything at 30 yards. Obviously as you get further out it will affect it but for your zeroing purposes it does not. Even at 200 yards though, the effect on the bullet going from -20 up to 80 degrees F was only .3 inches. Also at such close ranges, a change in the sight height only affected the relative impact by as much as the sight height was changed.</p></blockquote><p></p>
[QUOTE="doctorjj, post: 1363178, member: 7292"] I just ran Bulletflight and to zero at 100 with a 1.5" sight height, you'd need to be 0.7 inches low at 30 yards. A better zero might be 200 and for that you'd need to be 0.5 inches low at 30 yards. That's with an 80 gr bullet. For a 100 gr Core-Lokt, you'd need to be 0.6 low for 100 yard zero and 0.1 inch low for a 20 yard zero. I also ran various temperatures, pressures and humidities and non of that changed anything at 30 yards. Obviously as you get further out it will affect it but for your zeroing purposes it does not. Even at 200 yards though, the effect on the bullet going from -20 up to 80 degrees F was only .3 inches. Also at such close ranges, a change in the sight height only affected the relative impact by as much as the sight height was changed. [/QUOTE]
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