Hi, Craig:
Federal's CastCores have the only published WFN ballistics I've seen. They're on page 15 of this PDF.
http://www.federalcartridge.com/pdf/2003Fedcat.pdf
The BC looks like it's around .215. It's jumps around at each range but that's likely from rounding off to the nearest 10 fps. Besides, quoting BCs to 3 decimal places gets you paper precision that's unobtainable in the field. Sierra's numbers show a drop in BC below 900 fps for comparable bullets. However my home brewed Ballistics program only shows a difference of 0.9" at 200 yards with a 100 yard zero, using BCs of .220 and .190.
So far as I know only the Sierra and Oehler programs allow a variable BC.
http://www.sierrabullets.com/
http://www.oehler-research.com/explore.html
You should check out the calculator that IDShooter mentioned, as it's very precise, much better than mine. However, unless you can find accurate BCs for your bullets, a range test of drop is the best answer.
Bye
Jack
Federal's CastCores have the only published WFN ballistics I've seen. They're on page 15 of this PDF.
http://www.federalcartridge.com/pdf/2003Fedcat.pdf
The BC looks like it's around .215. It's jumps around at each range but that's likely from rounding off to the nearest 10 fps. Besides, quoting BCs to 3 decimal places gets you paper precision that's unobtainable in the field. Sierra's numbers show a drop in BC below 900 fps for comparable bullets. However my home brewed Ballistics program only shows a difference of 0.9" at 200 yards with a 100 yard zero, using BCs of .220 and .190.
So far as I know only the Sierra and Oehler programs allow a variable BC.
http://www.sierrabullets.com/
http://www.oehler-research.com/explore.html
You should check out the calculator that IDShooter mentioned, as it's very precise, much better than mine. However, unless you can find accurate BCs for your bullets, a range test of drop is the best answer.
Bye
Jack
