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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
G1... G7... ??
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<blockquote data-quote="Jeff In TX" data-source="post: 337188" data-attributes="member: 1522"><p>Good thread folks. When it comes to bullet designs, Bryan and I and few others on some other shooting boards have been trying to help folks understand why a G1 BC is obsolete, actually has been since it's inception but proved to be a great marketing tool for bullet companies. The G7 BC has become the new focal point primarily because of Bryan's work at Berger. </p><p></p><p>Berger designs and builds some of the best VLD shooting and hunting bullets on the market and with Bryan's knowledge, field testing and resources he's posted a vast library of G7 coefficient drag model BC's. This has been a huge win win for the shooting public and it's finally making other bullet manufactures take notice that the old G1 BC isn't going to cut it much longer. Shooters are becoming educated to the real facts of BC's!</p><p></p><p>Having said that, not every type of bullet will fit the G7 coefficient drag model either. The G7 coefficient drag model was developed for VLD bullets and that's Berger's bread and butter bullets, it's what they know and do very well! </p><p></p><p>A lot of boat tail bullets such as Sierra's BTHP Match king bullets better fit the G5 coefficient drag model rather that the G7. Flat base spire points use a G6 coefficient drag model. However, mathematically we may be splitting hairs with some boat tail bullets and you'll always be much better off using a G7 coefficient drag model than a G1. </p><p></p><p>My point is, there are a number of different coefficient drag models to choose from for different bullet designs. Using the proper coefficient drag model for the type of bullet you're shooting will always produce the best results when using a ballistic program.</p><p></p><p>And Bryan, thanks for all your research and testing, you're still the man!</p></blockquote><p></p>
[QUOTE="Jeff In TX, post: 337188, member: 1522"] Good thread folks. When it comes to bullet designs, Bryan and I and few others on some other shooting boards have been trying to help folks understand why a G1 BC is obsolete, actually has been since it’s inception but proved to be a great marketing tool for bullet companies. The G7 BC has become the new focal point primarily because of Bryan’s work at Berger. Berger designs and builds some of the best VLD shooting and hunting bullets on the market and with Bryan’s knowledge, field testing and resources he’s posted a vast library of G7 coefficient drag model BC’s. This has been a huge win win for the shooting public and it’s finally making other bullet manufactures take notice that the old G1 BC isn’t going to cut it much longer. Shooters are becoming educated to the real facts of BC’s! Having said that, not every type of bullet will fit the G7 coefficient drag model either. The G7 coefficient drag model was developed for VLD bullets and that’s Berger’s bread and butter bullets, it's what they know and do very well! A lot of boat tail bullets such as Sierra’s BTHP Match king bullets better fit the G5 coefficient drag model rather that the G7. Flat base spire points use a G6 coefficient drag model. However, mathematically we may be splitting hairs with some boat tail bullets and you’ll always be much better off using a G7 coefficient drag model than a G1. My point is, there are a number of different coefficient drag models to choose from for different bullet designs. Using the proper coefficient drag model for the type of bullet you’re shooting will always produce the best results when using a ballistic program. And Bryan, thanks for all your research and testing, you’re still the man! [/QUOTE]
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G1... G7... ??
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