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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How do you determine "at the lands" by your method?
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<blockquote data-quote="BountyHunter" data-source="post: 33700" data-attributes="member: 12"><p>Ogive checking just came in within the last 2-3 years or so. So do it and some do not. I am not the Ballistics guru and tester that some are. Henry Childs on BR central (goes by HBC) is the leader in this.</p><p></p><p>He has done serious testing and says it really takes out lot of vertical, but more importantly "rounds" out the groups.</p><p></p><p>His big thing now is metplats. Ie uniforming them to standard length from ogive. Either the Tooley tool or the one from Kevin Cram (Montour Rifles). Cuts BC by .2% on average. Non uniformity can cause a 5% BC variance which is 6 inches vertical at 1000.</p><p></p><p>Tooley is cutting tips off and installing own plastic tips on some bullets.</p><p></p><p>Dave and Steve Shelp tested the new Clinch River 6.5 cal 140 grain "flatbase" bullet this weekend in Ohio and kicked butt. Think about 4 five and four inch groups for light guns. Seems to like a 9 twist barrel.</p><p></p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 33700, member: 12"] Ogive checking just came in within the last 2-3 years or so. So do it and some do not. I am not the Ballistics guru and tester that some are. Henry Childs on BR central (goes by HBC) is the leader in this. He has done serious testing and says it really takes out lot of vertical, but more importantly "rounds" out the groups. His big thing now is metplats. Ie uniforming them to standard length from ogive. Either the Tooley tool or the one from Kevin Cram (Montour Rifles). Cuts BC by .2% on average. Non uniformity can cause a 5% BC variance which is 6 inches vertical at 1000. Tooley is cutting tips off and installing own plastic tips on some bullets. Dave and Steve Shelp tested the new Clinch River 6.5 cal 140 grain "flatbase" bullet this weekend in Ohio and kicked butt. Think about 4 five and four inch groups for light guns. Seems to like a 9 twist barrel. BH [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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How do you determine "at the lands" by your method?
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