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Rifles, Reloading, Optics, Equipment
Reloading
Sort by bearing length and by weight?
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<blockquote data-quote="Mikecr" data-source="post: 607727" data-attributes="member: 1521"><p>I do have a Buhay/Tubbs/JB comparator, and a more accurate tool of my own design. I have seen no qualified evidence of bearing variance affects to MV, only internet inferences that so far hold little basis.</p><p>I see no 'cold hard data' from anyone, and my own testing indicated no benefit with consideration of bearing variance only.</p><p>I think my input is valid as any.</p><p>Also this is not 'sorting by ogive' as that is done by a completely different tool(B.G.C and/or my mine).</p><p></p><p>On bullet weight(only), .5gr variance on a 140gr VLD might shift POI .07moa(~3/4") @ 1Kyd. Worth weighing hell that's easy enough. But variance around and beyond that(with that bullet) would make other things about the lot suspect IMO.</p><p>I don't see that much with Bergers, JLKs, Jayners, BIBs or Lapuas.</p><p>Now with big heavy .338cal bullets(like a 300smk) you could see more weight variance of coarse, but it's affect on BC would be half as much compared to same with a 140vld.</p><p></p><p>esshup, I'm not out to dissuade your efforts, and I couldn't tell you what to do, other than to consider what it is you're actually doing. </p><p>For all you know, bullets sorted to match in bearing, or weight, won't match in BC.</p><p>Which will have a larger affect downrange?</p><p>Well it's my contention that understanding this matters.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 607727, member: 1521"] I do have a Buhay/Tubbs/JB comparator, and a more accurate tool of my own design. I have seen no qualified evidence of bearing variance affects to MV, only internet inferences that so far hold little basis. I see no 'cold hard data' from anyone, and my own testing indicated no benefit with consideration of bearing variance only. I think my input is valid as any. Also this is not 'sorting by ogive' as that is done by a completely different tool(B.G.C and/or my mine). On bullet weight(only), .5gr variance on a 140gr VLD might shift POI .07moa(~3/4") @ 1Kyd. Worth weighing hell that's easy enough. But variance around and beyond that(with that bullet) would make other things about the lot suspect IMO. I don't see that much with Bergers, JLKs, Jayners, BIBs or Lapuas. Now with big heavy .338cal bullets(like a 300smk) you could see more weight variance of coarse, but it's affect on BC would be half as much compared to same with a 140vld. esshup, I'm not out to dissuade your efforts, and I couldn't tell you what to do, other than to consider what it is you're actually doing. For all you know, bullets sorted to match in bearing, or weight, won't match in BC. Which will have a larger affect downrange? Well it's my contention that understanding this matters. [/QUOTE]
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