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Long Range Hunting & Shooting
I need a new rifle wanna help.. part 2 sorta..
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<blockquote data-quote="308175" data-source="post: 8376" data-attributes="member: 1102"><p>Brent,</p><p></p><p> I maybe saying that powder charge in general may have a little to do with BC but not that much. What I am saying is that Because the 308 win is so well ballanced all the way around it becomes much more efficient than a 30-06 or 300 win and so forth. I believe that there is more to BC's than just bullet form and velocity, although these are 2 of the biggest factors. Twist, barrel legnth, twist quality, bore quality, cartride size, demenssions, load density, and of course the ampmosphere and more.</p><p></p><p>The apmosheric conditions all my testing done was anywhere from 80-100 degrees. BP was anywhere from 28.53-28.74 humidity was anywhere from 30-70% and altittude is 1100' A true MV of 2554 was used and loads are kept about the same temprature for day to day concistency. Unless I am missing something, this is all the input value for the ballistic calculator. Rounds are fired at 100-800 yards, then the clicks are calculated into inches of drop. All data is then put into the calculator with a BC of .500 to start. The BC is increased untill the numbers match. I came up with .560 for the 178 out of my personal rifle. It will not be the same rifle to rifle.</p></blockquote><p></p>
[QUOTE="308175, post: 8376, member: 1102"] Brent, I maybe saying that powder charge in general may have a little to do with BC but not that much. What I am saying is that Because the 308 win is so well ballanced all the way around it becomes much more efficient than a 30-06 or 300 win and so forth. I believe that there is more to BC's than just bullet form and velocity, although these are 2 of the biggest factors. Twist, barrel legnth, twist quality, bore quality, cartride size, demenssions, load density, and of course the ampmosphere and more. The apmosheric conditions all my testing done was anywhere from 80-100 degrees. BP was anywhere from 28.53-28.74 humidity was anywhere from 30-70% and altittude is 1100' A true MV of 2554 was used and loads are kept about the same temprature for day to day concistency. Unless I am missing something, this is all the input value for the ballistic calculator. Rounds are fired at 100-800 yards, then the clicks are calculated into inches of drop. All data is then put into the calculator with a BC of .500 to start. The BC is increased untill the numbers match. I came up with .560 for the 178 out of my personal rifle. It will not be the same rifle to rifle. [/QUOTE]
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I need a new rifle wanna help.. part 2 sorta..
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