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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Changed Berger B.C.
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<blockquote data-quote="BryanLitz" data-source="post: 244694" data-attributes="member: 7848"><p>Thank you for this information, it will help to illustrate the magnitude of the change (if I understand it correctly).</p><p></p><p>For simplicity, let's just consider your 900 yard groups, which you noted were 3.03" low using the original BC of .631. Now 3.03" is very close for 900 yards. In fact, within a single 1/4 MOA click (two clicks would be too much). </p><p></p><p>Now, if you had predicted that trajectory with the newly adjusted BC of .616, the lower BC would result in more predicted drop. How much more? Assuming ~2800 fps, the difference in vertical POI at 900 yards is 2.9" using a BC of .616 vs .631. In other words, if you had generated your drop tables using the new BC, you would have been within 0.1" at 900 yards instead of 3.03".</p><p></p><p>Of course we're splitting hairs now, I'm just trying to show how small the required change is, and this one example shows that it is in the right direction.</p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 244694, member: 7848"] Thank you for this information, it will help to illustrate the magnitude of the change (if I understand it correctly). For simplicity, let's just consider your 900 yard groups, which you noted were 3.03" low using the original BC of .631. Now 3.03" is very close for 900 yards. In fact, within a single 1/4 MOA click (two clicks would be too much). Now, if you had predicted that trajectory with the newly adjusted BC of .616, the lower BC would result in more predicted drop. How much more? Assuming ~2800 fps, the difference in vertical POI at 900 yards is 2.9" using a BC of .616 vs .631. In other words, if you had generated your drop tables using the new BC, you would have been within 0.1" at 900 yards instead of 3.03". Of course we're splitting hairs now, I'm just trying to show how small the required change is, and this one example shows that it is in the right direction. -Bryan [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Changed Berger B.C.
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