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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
140 grn 7mm berger. do i use G1 or G7 ?
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<blockquote data-quote="J E Custom" data-source="post: 390676" data-attributes="member: 2736"><p>The G7 method is based on a model that is closer to the modern bullet shape and therefore</p><p>will be more accurate if you calculate trajectories before you shoot.</p><p></p><p>If you do the range testing you will find the G7 will be closer to your range results. The only issue</p><p>with the G7 method it that the Ballistic Coefficient will be Much lower than the G1 BCs and that is</p><p>why bullet makers use the G1 method (Higher BC numbers sell bullets)</p><p></p><p>I recently did a test to determine BCs (Am going to post the results soon) of a fine bullet and </p><p>the G1 BC was .637 and the G7 BCs were .308 so you can see why they like the G1 method.</p><p></p><p>If the numbers don't worry you then go with the G7 method and you will be happier with the</p><p>results.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 390676, member: 2736"] The G7 method is based on a model that is closer to the modern bullet shape and therefore will be more accurate if you calculate trajectories before you shoot. If you do the range testing you will find the G7 will be closer to your range results. The only issue with the G7 method it that the Ballistic Coefficient will be Much lower than the G1 BCs and that is why bullet makers use the G1 method (Higher BC numbers sell bullets) I recently did a test to determine BCs (Am going to post the results soon) of a fine bullet and the G1 BC was .637 and the G7 BCs were .308 so you can see why they like the G1 method. If the numbers don't worry you then go with the G7 method and you will be happier with the results. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
140 grn 7mm berger. do i use G1 or G7 ?
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