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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Spin Drift and Baring surface
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<blockquote data-quote="Idaho Trecker" data-source="post: 1008432" data-attributes="member: 67706"><p>All of your responses have me thinking about this more in depth. What got me thinking this was shooting my 338 ultra and going by the rule of thumb and using 1 moa to correct spin drift alone. I am shooting the 285 grain A Max and noticed how much more surface it has compared to that of the 250 and 300 grain berger vld. The surface of the 250 is much smaller than the 285 but the 300 is almost identical. </p><p></p><p>If only I had a way to shoot both bullets under all the same conditions and rifle specs to get an idea. I know there are so many different factors between the bullets it may be impossible to find a definite answer. I think for a test it would still be interesting to see how much difference there would be with spin drift between the 250 berger vs the 285 a max since they roughly have 0.2" difference between surface area. </p><p></p><p>Too much thinking <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Idaho Trecker, post: 1008432, member: 67706"] All of your responses have me thinking about this more in depth. What got me thinking this was shooting my 338 ultra and going by the rule of thumb and using 1 moa to correct spin drift alone. I am shooting the 285 grain A Max and noticed how much more surface it has compared to that of the 250 and 300 grain berger vld. The surface of the 250 is much smaller than the 285 but the 300 is almost identical. If only I had a way to shoot both bullets under all the same conditions and rifle specs to get an idea. I know there are so many different factors between the bullets it may be impossible to find a definite answer. I think for a test it would still be interesting to see how much difference there would be with spin drift between the 250 berger vs the 285 a max since they roughly have 0.2" difference between surface area. Too much thinking :) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Spin Drift and Baring surface
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