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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
308 168gr Amax changes in BC at long range
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<blockquote data-quote="Michael Eichele" data-source="post: 436154" data-attributes="member: 1007"><p>Here is my observation on the 168 AMAX.</p><p></p><p>The ballistic calculators I use utilize a coefficient decay rate in place of drag models. The figure used to match G1 is .290. The higher the decay factor, the faster the BC is dropping. The lower the decay factor, the slower the BC is dropping. When I fired the 168 AMAX's over double chronies, I came up with .490 on the nose for G1. After setting up at 650 yards the first bullet and group drilled the center X. However, when firing out to 800 and 900 yards I have to use .500 for a decay rate with a BC of .490 to get the drops to match from 100-900 yards.</p><p></p><p>Its un-orthodox for sure but it works. In any event, it shows that the 168 AMAX does not hold it's BC as well as some other bullets.</p><p></p><p>M</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 436154, member: 1007"] Here is my observation on the 168 AMAX. The ballistic calculators I use utilize a coefficient decay rate in place of drag models. The figure used to match G1 is .290. The higher the decay factor, the faster the BC is dropping. The lower the decay factor, the slower the BC is dropping. When I fired the 168 AMAX's over double chronies, I came up with .490 on the nose for G1. After setting up at 650 yards the first bullet and group drilled the center X. However, when firing out to 800 and 900 yards I have to use .500 for a decay rate with a BC of .490 to get the drops to match from 100-900 yards. Its un-orthodox for sure but it works. In any event, it shows that the 168 AMAX does not hold it's BC as well as some other bullets. M [/QUOTE]
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308 168gr Amax changes in BC at long range
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