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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Berger Bullets update BC's on all their bullets
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<blockquote data-quote="BryanLitz" data-source="post: 1128480" data-attributes="member: 7848"><p>STOMP,</p><p></p><p>The following is the reply I posted to your question in the other forum, reposting here because it's a good question, and others may benefit from the answer:</p><p></p><p></p><p></p><p><em>The thick and thin jacket (Target and Hunting) versions of a bullet are made using the same shape BT and ogive dies. This is why we've always cited their dimensions as 'equal'. Although they are very close to being equal, there are subtle differences in the lengths and other dimensions which manifest as differences in BC. The updated quick reference sheet (<a href="http://www.bergerbullets.com/pdf/Quick-Reference-Sheets.pdf" target="_blank">http://www.bergerbullets.com/pdf/Quick-Reference-Sheets.pdf</a> ) lists the dimensions of each bullet. These dimensions, like the updated BC's, are running averages of recent production lots, and reflect the actual dimensions and performance of each individual bullet as opposed to representing both with the same numbers.</em></p><p><em></em></p><p><em>In the case of the 6mm 105 VLD, there's a greater than average difference between the Hunting and Target versions. The reason is the thick jacket Target version of the bullet won't eject from the ogive forming die with the smaller knock out pin, and so a larger knock out pin is used for that bullet. This results in the thick jacket bullet having a larger meplat (tip) than the hunting version, and a lower BC. You can read more details in this article that was published back in 2010 when the change took place: <a href="http://www.bergerbullets.com/change-to-6mm-105-grain-vld-target-bullet/" target="_blank">Change to 6mm 105 gr VLD Target Bullet | Berger Bullets Blog</a> Note the exact numbers have been updated since that article was written, but the explanation is accurate.</em></p><p><em></em></p><p><em>In most cases the thin and thick jacket VLD's use the same knock out pin and the difference between their BC's are not as great. Unfortunately the 6mm 105 suffered a hit on the target version due to the larger knock out pin being required.</em></p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 1128480, member: 7848"] STOMP, The following is the reply I posted to your question in the other forum, reposting here because it's a good question, and others may benefit from the answer: [I]The thick and thin jacket (Target and Hunting) versions of a bullet are made using the same shape BT and ogive dies. This is why we've always cited their dimensions as 'equal'. Although they are very close to being equal, there are subtle differences in the lengths and other dimensions which manifest as differences in BC. The updated quick reference sheet ([url]http://www.bergerbullets.com/pdf/Quick-Reference-Sheets.pdf[/url] ) lists the dimensions of each bullet. These dimensions, like the updated BC's, are running averages of recent production lots, and reflect the actual dimensions and performance of each individual bullet as opposed to representing both with the same numbers. In the case of the 6mm 105 VLD, there's a greater than average difference between the Hunting and Target versions. The reason is the thick jacket Target version of the bullet won't eject from the ogive forming die with the smaller knock out pin, and so a larger knock out pin is used for that bullet. This results in the thick jacket bullet having a larger meplat (tip) than the hunting version, and a lower BC. You can read more details in this article that was published back in 2010 when the change took place: [url=http://www.bergerbullets.com/change-to-6mm-105-grain-vld-target-bullet/]Change to 6mm 105 gr VLD Target Bullet | Berger Bullets Blog[/url] Note the exact numbers have been updated since that article was written, but the explanation is accurate. In most cases the thin and thick jacket VLD's use the same knock out pin and the difference between their BC's are not as great. Unfortunately the 6mm 105 suffered a hit on the target version due to the larger knock out pin being required.[/I] -Bryan [/QUOTE]
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Berger Bullets update BC's on all their bullets
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