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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Berger 338!!!
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<blockquote data-quote="BryanLitz" data-source="post: 239664" data-attributes="member: 7848"><p>All of the Berger .338 bullets are designed to be stable in a 1:10" twist, at any reasonable speed (anything over 2200 fps muzzle velocity).</p><p></p><p>Another thread on this forum was asking about the BC of the Berger .338's. I've copied my reply here since some of the same questions were being asked, and you guys might find it useful:</p><p></p><p>I'll stick my neck out there and make an estimate.</p><p></p><p>These numbers are based on the dimensions of the bullets, and a database of information I've compiled that relates measured (tested) BC to bullet geometry. This method results in estimates that are typically within +/- 3% of the measured BC.</p><p></p><p>The BC's are average from 3000 to 1500 fps.</p><p></p><p>300 grain Tangent (non-VLD) ogive:</p><p>estimated G1 BC: 0.749 lb/in^2</p><p>estimated G7 BC: 0.384 lb/in^2</p><p></p><p>300 grain Secant (VLD) ogive:</p><p>estimated G1 BC: 0.855 lb/in^2</p><p>estimated G7 BC: 0.438 lb/in^2</p><p></p><p>For best results when doing trajectory calculations for these bullets, use the G7 BC if your program allows.</p><p></p><p>I'm very curious to test these bullets and see how accurate the estimates are.</p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 239664, member: 7848"] All of the Berger .338 bullets are designed to be stable in a 1:10" twist, at any reasonable speed (anything over 2200 fps muzzle velocity). Another thread on this forum was asking about the BC of the Berger .338's. I've copied my reply here since some of the same questions were being asked, and you guys might find it useful: I'll stick my neck out there and make an estimate. These numbers are based on the dimensions of the bullets, and a database of information I've compiled that relates measured (tested) BC to bullet geometry. This method results in estimates that are typically within +/- 3% of the measured BC. The BC's are average from 3000 to 1500 fps. 300 grain Tangent (non-VLD) ogive: estimated G1 BC: 0.749 lb/in^2 estimated G7 BC: 0.384 lb/in^2 300 grain Secant (VLD) ogive: estimated G1 BC: 0.855 lb/in^2 estimated G7 BC: 0.438 lb/in^2 For best results when doing trajectory calculations for these bullets, use the G7 BC if your program allows. I'm very curious to test these bullets and see how accurate the estimates are. -Bryan [/QUOTE]
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Berger 338!!!
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