View Full Version : need ballistic coeficient
44mag1
02-17-2010, 12:17 AM
anybody know what the BC of an RCBS 7mm 145 silhouette boolit is?
MtGun44
02-17-2010, 01:03 AM
Only way to know is to shoot it at different ranges and see how it drops. Most of the old
BCs in books were estimates. A given bullet will give a different BC from different rifles, too,
altho usually a small difference.
Bill
Ford SD
02-17-2010, 01:10 AM
from rcbs cast bullet book 7mm-145 sil BC=.272
from rcbs cast bullet book 7mm-168 sp BC=.306
44mag1
02-17-2010, 10:04 AM
thanks
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